Anime Like Hans Christian Anderson's The Little Mermaid

Since the launch of the revolutionary NerveGear, players worldwide have been able to immerse themselves fully in virtual reality. Among the console's most popular titles is Sword Art Online (SAO), which transports users to the sprawling, medieval world of Aincrad, where they can explore limitless possibilities limited only by imagination. With the game's global release, virtual reality gaming has never felt so real. But this perfect fantasy swiftly turns into a harrowing nightmare when SAO's creator traps thousands of players inside the game. The logout function has been disabled, and the only way to escape is to clear all one hundred increasingly treacherous floors of Aincrad. Worse still, any death inside the game results in real-world death. Kazuto "Kirito" Kirigaya, a former beta-tester, soon discovers that even with his prior knowledge, he cannot conquer SAO on his own. Partnering with Asuna Yuuki and other skilled players, he strives to overcome the seemingly impossible challenges ahead. However, between formidable bosses and sinister dark cults blocking their path, Kirito learns that these tasks are far easier said than done.

A year after his escape from Sword Art Online, Kazuto Kirigaya has been readjusting to life in the real world. But his tranquility is interrupted when a troubling event emerges in the game Gun Gale Online, where a player called Death Gun is supposedly murdering individuals in reality by shooting them within the game. Summoned by authorities to help look into the killings, Kazuto takes on his alias Kirito once more and enters Gun Gale Online, determined to stop the culprit. Inside the game, Kirito encounters Sinon, a talented sniper troubled by a traumatic history. She soon becomes entangled in his pursuit of Death Gun, and the two of them participate in the Bullet of Bullets, a tournament where their target is certain to appear. Unsure of Death Gun's true abilities, Kirito and Sinon hurry to prevent him from claiming another victim. However, obstacles arise when their past traumas hinder their progress. In a perilous game where either of them could be the next target, Kirito risks his life in the virtual realm once again.

That chaotic structure, that din of hissing steam and creaking joints, with smoke billowing as it moves on its own... That castle belongs to the great wizard Howl, renowned for both his magical abilities and his reputation as a womanizer—or so the gossip goes in Sophie Hatter's small town. Sophie, as the plain daughter of a hatmaker, doesn't expect much from her future and is content to work hard in the shop. However, Sophie's simple life takes an exciting turn when she becomes trapped in a troubling situation, and the mysterious wizard appears to rescue her. Unfortunately, this brief encounter spurs the vain and vengeful Witch of the Waste—driven by jealousy over a past conflict with Howl—to place a curse on the maiden, transforming her into an old woman. In an effort to return to normal, Sophie must join Howl and a host of eccentric companions—from a powerful fire demon to a hopping scarecrow—in his living castle, on a perilous adventure as a raging war tears their kingdom apart.

By the beginning of the 21st century, magic—once dismissed as myth and legend—has been transformed into a structured technology and taught as a technical discipline. At First High School, an institution for magicians, students are divided into two groups based on their entrance exam scores: "Blooms" are those who earn high marks and are placed in the First Course, while "Weeds" are reserve students assigned to the Second Course. Mahouka Koukou no Rettousei follows the siblings Tatsuya and Miyuki Shiba, who enroll at First High School. After taking the exam, the gifted Miyuki is placed in the First Course, whereas Tatsuya ends up in the Second Course. Despite his low practical test scores and his status as a "Weed" suggesting magical incompetence, Tatsuya possesses remarkable technical knowledge, strong physical combat skills, and unique magical abilities—making him the irregular at a magical high school.

Thirty years ago, a massive "spatial quake," a phenomenon involving space vibrations of unknown origin, devastated the Eurasian continent and claimed over 150 million lives. Since then, these quakes have continued to occur worldwide, though on a smaller scale. Shidou Itsuka is an ordinary high school student living with his younger sister, Kotori. When an impending spatial quake threatens Tengu City, he rushes to save her but gets caught in the eruption. At the quake's epicenter, he finds a mysterious girl who is identified as a "Spirit," a supernatural being whose appearance triggers such quakes. Soon, he is caught in a battle between the girl and the Anti-Spirit Team, a ruthless task force dedicated to eliminating Spirits. Yet there is a third group that believes in saving the Spirits: "Ratatoskr," which, surprisingly, is commanded by Shidou's little sister! After the clash, Kotori forcibly enlists Shidou and offers him an alternative approach to handling the danger Spirits pose—make them fall in love with him. Now, the world's fate depends on his dating skills as he sets out to charm the Spirits.

In this world, only a handful of humans can manifest their souls into formidable weapons. These individuals, called Blazers, undergo training at the prestigious Hagun Academy to become Mage-Knights. Among the student body is the so-called failure Ikki Kurogane, the sole F-ranked Blazer. But when the academy's worst student accidentally sees Stella Vermillion—an A-ranked Blazer who is also a princess—in the nude, she challenges him to a duel with severe stakes: the loser becomes the winner's slave. There's no way Stella could possibly lose, right? As he strives to demonstrate his strength to a world that considers him the weakest, Ikki acquires new friends, insight, and experience.

Fifteen-year-old Chise Hatori, having been abandoned in her youth and mocked by others for her strange ways, was sold at auction for five million pounds to a tall, masked stranger. Desperate for a home, she eagerly accepted her fate. While being led away in chains, she overhears robed figures whispering that their new owner has acquired a rare Sleigh Beggy. The stranger, who reveals himself to be the magus Elias Ainsworth, uses teleportation magic to transport them to his charming countryside cottage in England. There, Chise encounters fairies and other magical creatures, officially beginning her life as the apprentice and designated bride of the ancient magus.

After a mysterious fire kills his family, Shirou is rescued and adopted by Kiritsugu Emiya, who trains him in magic and the path of justice. Years after Kiritsugu's death, Shirou is cleaning the school one night when he gets caught in the middle of a deadly clash between two superhuman beings known as Servants. While trying to flee, he is caught by one of the Servants and sustains a life-threatening wound. Miraculously, he survives, but the same Servant returns to finish him off. In desperation, Shirou summons his own Servant—a knight named Saber. Now the two must take part in the Fifth Holy Grail War, a battle royale among seven Servants and the mages who summoned them, with the supreme prize being the all-powerful Holy Grail itself. Fate/stay night follows Shirou as he struggles to find the thin line between hero and killer, his ideals clashing with the harsh reality around him. Will the boy become a hero like his adoptive father, or die trying?

Set in ancient Disboard, Riku is a fierce young warrior dedicated to saving humanity from the Exceed, sixteen sentient races locked in a violent struggle to establish the One True God among the Old Deus. In this lawless world, humans, lacking magic and possessing fragile bodies, are easy prey for the other Exceed, pushing the race to the brink of extinction. Hope returns when Riku discovers Schwi, a powerful female Ex-Machina, in an abandoned elf city. Banned from her Cluster for studying human emotions, Schwi believes humanity’s survival hinges on these feelings and is determined to understand the human heart. Amidst the chaos, Riku and Schwi form an unlikely alliance, seeking answers to their personal deficiencies in one another as they fight for survival. Together, they must uncover the true meaning of humanity and prevent the race’s extinction, striving to bring peace to all of Disboard.

Princess Yona of the Kouka Kingdom lives a sheltered life, her childlike innocence captivating everyone she meets. Protected within the palace walls, she is kept far from any real danger. But her idyl existence is shattered by an act of treason that endangers her birthright and forces her to flee. With only her childhood friend and loyal bodyguard, Son Hak, to rely on, Yona must navigate a dangerous world outside the castle. No longer naive, she vows to grow strong enough to defeat her enemies. Together with Hak, she seeks to uncover the secrets of an ancient legend, hoping it will help her reclaim her stolen kingdom.

Following the crimson sun's disappearance, the Breakdown Phenomenon strikes Arata Kasuga's town, causing everyone to vanish. His world is not completely lost, though, because his childhood friend and cousin, Hijiri Kasuga, gives him a magical grimoire that artificially rebuilds reality. To look into this disaster, Lilith Asami arrives and gives Arata a choice: hand over the book or die. Instead, Arata picks a third option: enrolling at the secretive Royal Biblia Academy, where he meets six other magic users. Along with Lilith, these six make up the Trinity Seven, the school's elite each possessing unique powers and abilities. Driven by his wish to save Hijiri and aided by his new allies, Arata leaves no stone unturned in his quest to stop his hometown's destruction and bring his best friend back to life.

Louise Françoise Le Blanc de La Vallière is a proud mage in a world defined by wands, cloaks, and nobility. She attends the esteemed Tristain Academy for mages but fails at casting spells correctly, earning her the mocking nickname "Louise the Zero" from her classmates. During the required first-year familiar summoning ritual, Louise's attempt produces a massive explosion. Everyone dismisses it as another failure, but when the smoke clears, Saito Hiraga appears. He is treated like a slave, forced to clean Louise's clothes and eat off the floor. However, a strange mark resembling the legendary familiar Gandalfr appears on his hand, hinting that he is no ordinary summon. In this wild, adventurous, and explosive tale, Saito must adapt to his new life while Louise discovers she is far more than her humiliating nickname suggests.

On her fifteenth birthday, Kagome Higurashi is suddenly dragged by a demon into the old well at her family's shrine, sending her back to feudal Japan, a time when demons roamed freely. There, she becomes the target of relentless attacks from creatures driven by their desire for the Shikon Jewel, a small orb of immense power that she unknowingly carries. In this dangerous situation, she meets Inuyasha, a half-demon boy who initially mistakes her for Kikyou, a shrine maiden he holds a grudge against. This resemblance sparks a strong hostility from Inuyasha toward Kagome. Yet, once he understands the peril they both face, he puts his animosity aside and offers his help. During a struggle over the Shikon Jewel, the sacred object is broken into countless fragments that scatter across the land. Alarmed by the potential chaos this could cause, Kagome and Inuyasha embark on a difficult mission to gather the shards before they can be misused.

While his parents are away overseas, Kimihito Kurusu enjoys a quiet, normal life—until monster girls arrive and disrupt his peace. In this alternate Japan, the country leads global efforts to integrate non-human species through its advanced interspecies exchange program. But thanks to coordinator Agent Smith's incompetence, Kimihito is mistakenly made the live-in caretaker for Miia, a Lamia. This error turns him into the center of a rapidly growing harem of women from various species, all drawn to him by powerful attraction and erotic tension. The situation grows more complicated due to the Interspecies Exchange Act, which strictly forbids sexual relations between humans and monsters. The only legal way around this ban is a controversial experimental marriage clause. As a result, Kimihito's life descends into chaos as he navigates a maze of species-specific rules and sensitive legal loopholes. His passionate, affectionate, and lustful new housemates constantly pursue his romantic and physical attention. With new monster girls frequently appearing and unpredictable events always happening, it's impossible to guess where Kimihito and his chaotic harem will end up next.

In the MMORPG Cross Reverie, the Demon King Diablo stands unmatched in power. With the game's most coveted items and a maxed-out player level, he crushes any challenger with ease. Yet behind the screen, Diablo is Takuma Sakamoto—a socially awkward recluse whose only passion is his gaming life, even as he steamrolls endless foes. His routine is broken when a summoning spell drags him into a world that looks just like the game, where he keeps Diablo's form. There, he finds his summoners: Rem Galeu, a small Pantherian adventurer, and Shera L. Greenwood, an Elf summoner. They try to use an Enslavement Ritual to control him, but the magic backfires, making them his slaves instead. Trapped in this awkward situation, Takuma sets out with the girls to find a way to break the contract while adapting to his new life as the feared Demon King.

Youkai Academy appears to be a typical boarding school, but its entire student body consists of monsters trying to coexist with humans. The students attend classes disguised as ordinary humans, studying standard subjects such as literature, physical education, foreign languages, and math. However, beneath this veneer, the school enforces a strict rule: any human discovered on the premises must be executed immediately. Tsukune Aono is an ordinary high school student whose failing grades prevent him from entering any secondary school. Desperate to secure an education, his parents accidentally enroll him at Youkai Academy as a last resort. Once inside this hidden world, he encounters Moka Akashiya, the most popular and attractive girl at the school. Eager to pursue a relationship with her, he decides to remain at the dangerous institution, unaware that her beautiful exterior conceals a terrifying vampire nature. Rosario + Vampire is a supernatural school comedy that follows Tsukune’s romantic endeavors, daily life, and various misadventures as he navigates existence among a host of beautiful yet perilous supernatural beings.

A century ago, a massive catastrophe called the Invertia transformed the world, weakening established countries and allowing the Integrated Empire Foundation to gain power. This event also created the Genestella—humans with superhuman abilities. The most talented among them are chosen to attend elite schools, where they battle in public tournaments known as Festas. Ayato Amagiri transfers to the struggling Seidoukan Academy on a scholarship. After accidentally seeing Julis-Alexia von Riessfeld, the Witch of Resplendent Flames, in an embarrassing situation, she demands a duel. Though the match is called off, Ayato makes it clear he has no interest in Festas; he came to search for his missing older sister. But as a dark plot unfolds, Ayato must fight to survive, surrounded by some of the most powerful Genestella in the world.

Spirits are otherworldly entities of immense power whose appearances cause devastating spatial quakes. While certain factions seek their annihilation, others prefer to capture their affections and neutralize their powers. Having already sealed three Spirits, Shidou Itsuka continues his work with Ratatoskr, seeking out new targets and romancing them to safeguard the world. However, this time around, the pair confronts a growing menace that extends beyond the Spirits themselves, as a far more dangerous force begins to observe their activities.

Two years after the Fourth Great Ninja War, Konohagakure enjoys peace and harmony—until Sixth Hokage Kakashi Hatake detects the moon dangerously descending toward Earth, threatening planetary destruction. Amid this crisis, a new evil emerges: Toneri Ootsutsuki, who abruptly kidnaps Hinata Hyuuga's younger sister Hanabi. Kakashi dispatches a skilled ninja team consisting of Naruto Uzumaki, Sakura Haruno, Shikamaru Nara, Sai, and Hinata to rescue Hanabi from Toneri's sinister grasp. However, the team encounters multiple obstacles during their mission, thwarting their attempts. With Hanabi's abduction, the bonds shared among the team are put to the test, and as the world teeters on the brink of annihilation, they must race against time to safeguard their planet. Meanwhile, as the battle unfolds, Naruto finds himself driven to fight for something greater than he ever imagined—love.

In the kingdom of Earlshide, Merlin Wolford was once hailed as a national hero for his tremendous power and achievements. Wanting a quiet life, he retired to a secluded rural area to raise an orphan he had rescued. That child is Shin, a former Japanese office worker reincarnated into this world with his past memories intact. Over the years, Shin demonstrates remarkable brilliance in both magic and combat, continually astonishing Merlin. However, on his fifteenth birthday, it becomes apparent that Shin’s talents are purely combat-oriented, leaving him socially awkward, lacking common sense, and somewhat reckless. To address these deficiencies, he enrolls in the kingdom’s Magic Academy to grow alongside his peers. But a peaceful existence proves impossible, as he quickly becomes a local sensation upon arrival. As Shin Wolford adjusts to school life in the capital, he forms friendships, explores the world, and faces the various evil forces threatening him and his city.

The world’s greatest assassin, who devoted his life to the organization that raised him, is betrayed and killed by that very group. Haunted by lingering regrets, he meets a goddess impressed by his skills. She offers him a new life in a fantasy world of magic and steel, charging him with a crucial mission: kill the hero destined to destroy that world. Reborn as Lugh Tuatha Dé, heir to a noble family of assassins serving the Alvan Kingdom, he learns from his father techniques that differ from his earlier ruthless style. As he hones his other talents and forges new connections, Lugh remains painfully aware that his present abilities fall short. To fulfill his divine task, he must attain absolute perfection to defeat such a formidable opponent.

In ancient times, all humans lived beneath the sea. However, some chose the surface and permanently abandoned underwater life. As a result, they lost the divine protection called "Ena" that allowed them to breathe underwater. Over the years, the divide between the people of the sea and those of the surface widened, though some contact between them still remained. Nagi no Asu kara follows Hikari Sakishima and Manaka Mukaido, along with their childhood friends Chisaki Hiradaira and Kaname Isaki, who are forced to leave the sea and attend a school on the surface. There, the group also meets Tsumugu Kihara, a fellow student and fisherman who loves the sea. Hikari and his friends' lives are destined to change as they confront the deep-seated hatred and discrimination between the sea and surface peoples, the storms in their personal lives, and an approaching tempest that may spell doom for all who live on the surface.

After being struck down by a stray lightning bolt from an inattentive deity, Touya Mochizuki is granted a second life in a fantasy world as compensation. He is permitted to bring a single item from Earth, choosing to keep his smartphone as he begins his new journey. Naturally gifted in magic within this mana-rich environment, Touya quickly finds himself the object of affection for several beautiful women. His circle includes the Silhoueska twins, Linze and Elze, along with Yumina Urnea Belfast, Leen, and Yae Kokonoe. Although their romantic pursuits create various complications in his life, their presence also offers him valuable companionship as he explores the secrets of this new realm.

Individuals able to manifest weapons from their souls are called Blazers and attend Kouryou Academy High School to hone their abilities. Students are required to partner up, aiming for the ultimate objective of reaching the Absolute Duo state. After a mysterious killer murders his sister and friends, Tooru Kokonoe enters the academy in search of strength and revenge. During the opening ceremony, he is forced to duel the student sitting next to him, with expulsion hanging in the balance for the loser. As Tooru prepares for combat, his soul produces a shield instead of a weapon. This unusual occurrence catches the attention of Julie Sigtuna, a foreign student at the school.