Manga Like My Oneechan's Personality Changes When She Plays Games.

Eikichi Onizuka, a 22-year-old former gang member carrying a reputation as a pervert, unexpectedly secures a position as a teacher. The story follows Onizuka as he works to outsmart and earn the trust of his rebellious Class 3-4, a group determined to get him fired. Along the way, he must confront obstacles including the irritable, balding Vice Principal Hiroshi Uchiyamada, old enemies from his biker days, and his own unorthodox teaching methods. Despite these challenges, Onizuka perseveres, helping his students, pursuing the affections of teacher Azusa Futsuyuki, and striving to live up to his self-given title. This collection also includes the side story "GTO: Great Toroko Oppai♡" (Tomoko's Big Adventures).

Ken, a high school student from a wealthy background, becomes a notorious fighter after losing his parents due to their connections to the Yakuza. Driven solely by his affection for his classmate Yumi, Ken's world shifts when he learns of her decision to move to Korea to join the police force. Determined to be with her, he leaves his life in Japan behind and follows her. Unexpectedly, Ken finds himself leading a local gang and keeps this new role hidden from Yumi. As their leader, the gang is renamed the Sun-Ken Rock Group under his guidance. One-shot included: Volume 12: Trigun: The Lost Plant

In "Sankarea: Undying Love," Chihiro Furuya has an unusual fascination with the dead, especially female zombies. After his beloved cat Baabu dies accidentally, his obsession grows, and he begins experimenting with a potion meant to bring the dead back to life. Despite repeated failures, Chihiro nearly gives up on his goal to resurrect Baabu. Just before he abandons the effort, Chihiro meets Rea Sanka, a beautiful but deeply troubled girl, who inspires him to keep trying. By adding toxic hydrangea petals to his potion, Chihiro finally creates the elixir he has been seeking. Unbeknownst to him, Rea drinks the concoction, believing its poison will end her life. After a fatal accident, Rea dies, but the elixir works, bringing her back as a zombie. Freed from her oppressive past, Rea chooses to live with Chihiro, who now must use his knowledge of the undead to care for the teenage zombie girl.

In "Monster Musume: Everyday Life with Monster Girls," monsters are not merely products of imagination but real beings in search of human companionship. Three years ago, the world discovered that mythical creatures such as harpies, centaurs, and catgirls are genuine, possessing scales, feathers, horns, and fangs. The "Cultural Exchange Between Species Act" has allowed these formerly legendary beings to integrate into human society, though this process remains in its early stages. Kurusu Kimihito, an ordinary human, finds himself involuntarily enrolled in the government's exchange program, which completely upends his life. He becomes responsible for caring for Miia, a lamia resembling a snake-like monster girl, as she adapts to human life. However, Miia is highly charming, and the law prohibiting interspecies reproduction is strictly enforced. Complicating Kimihito's situation further is the arrival of a striking centaur and a teasing harpy, leaving him to navigate his growing affections under difficult circumstances.

Negi Springfield, a ten-year-old wizard who recently graduated from Merdiana Magic Academy in Wales, has two primary objectives: locating his missing father, the legendary Thousand Master, and earning the title of Magister Magi, a wizard whose purpose is to aid the non-magical world. As his final assignment, he is sent to teach English at a Japanese middle school. Upon his arrival, Negi is surprised to discover that he is responsible for a homeroom class of thirty-one girls. One of his students, Asuna Kagurazaka, accidentally discovers his magical identity. With this secret now exposed, Negi must prevent it from spreading further while dealing with various magical threats emerging both inside and outside Mahora Academy, all while continuing his search for his father.

After finishing high school, Hideki Motosuwa moves to Tokyo to attend a cram school, hoping to get into his dream university. Working late nights at a bar leaves him disconnected from new technology, especially humanoid computers called Persocoms. Wanting one for himself, Hideki finds a discarded persocom in a pile of trash. When he turns it on, he discovers this persocom, who can only say "Chii," is unusual. He names her Chii and learns she can think and learn on her own, making her a rare Chobit. Hideki begins helping Chii adjust to human life while trying to solve the mystery of the Chobit series.

In "Shijou Saikyou no Deshi Kenichi," Kenichi Shirahama, a gentle but often bullied 15-year-old, joins his school's karate club with the aim of becoming stronger. However, he quickly becomes a punching bag for the seniors. His life takes a turn when Miu Fuuriniji, a stunning new student and skilled martial artist, introduces him to the Ryozanpaku dojo. There, Kenichi meets six unusual masters who immediately take him under their wing. The series chronicles Kenichi's journey as the world's strongest disciple, training relentlessly under these exceptional martial arts masters, each with their distinct fighting style. His goal is to gain the strength necessary to protect what is important to him.

In "Medaka Box," Kurokami Medaka, a first-year student, becomes Student Council President and creates a suggestion box called the "Medaka Box." She invites all students to share their concerns freely, promising to solve every single one. After winning the Student Council election with 98 percent of the votes, Medaka, as the only council member, enlists her childhood friend Hitoyoshi Zenkichi, who reluctantly takes the lowest position in the council. The team grows when Medaka recruits Akune Kouki, a former judo club member, as secretary, and Kikaijima Mogana, a current swim club member, as treasurer, for a daily payment of 300 yen. The Student Council works on solving problems reported through the Medaka Box, handling various challenges like students in the wrong clubs causing trouble, girls asking for advice on love letters, and people searching for lost pets. Through these efforts, they slowly earn the trust and respect of the entire school.

Several months after the events of the first season, Youkai Academy has been rebuilt and a new semester begins. Tsukune and his companions return, having grown stronger. The true nature of Anti-Thesis is revealed, along with new enemies and a threat far more dangerous than anything they have faced before. Tsukune struggles with the monster awakening inside him. With guidance from Moka, Mizore, Kurumu, Ruby, and Yukari, he trains to control his vampire heritage and gain the power needed to protect those close to him. The second season explores more of the girls' backgrounds and their family connections. New trials await, along with new allies who will join their side. Together, they seek to uncover the secrets behind Moka's rosary and her bloodline.

A legend says that any couple who enters the University of Tokyo together will find eternal happiness. For Keitarou Urashima, getting in has been a struggle; after failing the entrance exam twice, he decides to stay at his grandmother's inn in Tokyo to prepare for a third attempt. When he arrives, he discovers his grandmother is not there and the inn has been turned into Hinata House, a women-only dormitory. His first visit is filled with misunderstandings, making the residents suspicious of him. His aunt Haruka Urashima, who runs the dorm, accidentally lets it slip that he is supposedly a Tokyo University student, which changes the girls' perception and allows him to stay. Carrying the weight of this lie, Keitarou begins to get to know his new neighbors: the cute but aggressive Naru Narusegawa, the clever and resourceful Mitsune Konno, the gentle Shinobu Maehara, the disciplined Motoko Aoyama, and the playful Kaolla Su. Keitarou's difficult journey toward getting into Tokyo U becomes his goal, driven by a childhood promise to the one girl who was ever kind to him, and the hope of meeting her again.

In the world of online gaming, the legendary figure known as "Blank" is shrouded in mystery, renowned for conquering hundreds of games. In reality, Blank is comprised of two reclusive NEET siblings: the cunning 18-year-old Sora and the 11-year-old aloof prodigy, Shiro. As an unbeaten duo, they've amassed an impeccable record. Suddenly, they receive a cryptic email inviting them to a chess match. Following a flawless win, they find themselves transported to a vivid alternate universe. There, a jovial deity named Tet, who identifies himself as the "One True God," reveals that in the world of Disboard, conflicts are resolved solely through games. Among the 16 races, humans rank last, struggling to survive with merely a solitary city as their kingdom. In a society untouched by war for centuries, Sora and Shiro swiftly gain recognition. Driven by their ambition, they aim to challenge Tet and dominate this new realm using their unparalleled gaming skills.

Soun Tendou runs the Tendou Martial Arts School with his three daughters, Akane, Nabiki, and Kasumi. Their peaceful lives are disrupted when Soun reveals he has arranged for one of them to marry the son of another martial arts master to carry on the family legacy. The Tendou family is caught off guard when Ranma Saotome and his father, Genma, arrive at their doorstep. During his training in China with Genma, Ranma was involved in an accident that causes him to transform into a girl whenever he comes into contact with cold water, while Genma turns into a large panda. "Ranma ½" chronicles Ranma's efforts to adapt to this new life and his interactions with his intended fiancée, Akane, the youngest Tendou daughter. As they begin attending the same school, they face a variety of challenges and encounters with friends and competitors who all have differing views on their engagement.

In To Love Ru: Darkness, Rito Yuuki continues to struggle with his feelings for both his crush Haruna Sairenji and the alien princess Lala Satalin Deviluke. Lala's younger sister, Momo, develops a crush on Rito as well and decides to form a harem around him, hoping to secure her own position in his affections. Momo enrolls at Rito’s school and covertly assists his various potential love interests, even recruiting new candidates, including the newly arrived alien assassin known as Konjiki no Yami, or "Yami." Yami delays her next assignment due to Rito. However, Yami’s sister, Kurosaki Mea, intends to compel Yami to resume her duties as an assassin. To Love Ru: Darkness unfolds following the conclusion of To Love Ru, bringing in new female characters, new foes, and increasingly risqué scenarios.

Yamato Akitsuki, a bright and energetic boy, is excited to begin his high school life in Tokyo. Grateful for his aunt’s offer of a free room in her apartment building, he accepts without realizing it is an all-girls dormitory. His first day of school takes an interesting turn when Yamato notices a girl excelling at the high jump. Her skill and beauty captivate him, and he becomes determined to get to know her better. By chance, this girl, Suzuka Asahina, turns out to be his next-door neighbor. However, their interactions so far have caused Suzuka to form a negative impression of him. Despite these misunderstandings, Yamato decides to join the track team to try to make an impression on her. He soon finds himself developing into a promising sprinter in the 100-meter race. Balancing friendship and potential romance, Yamato dedicates himself to training, hoping to win Suzuka’s heart.

Third-year college student Shinichi Sakurai just wants a quiet life, but instead finds himself constantly accompanied by his energetic and well-endowed underclassman, Hana Uzaki. Concerned that her sour-faced senior will repeat his high school isolation during his college years, Uzaki decides to liven up Sakurai's days by dragging him along to hang out with her. Through their time together, the lively Uzaki demonstrates to her introverted senior that spending time with friends can be rewarding. And while Sakurai is greatly annoyed by Uzaki's relentless teasing, he still finds himself enjoying the moments they share—many of which end in amusingly awkward situations. Uzaki-chan wa Asobitai! is a slice-of-life series that follows the humorous interactions between Sakurai and Uzaki, whose completely different personalities lead to a quirky yet charming relationship.

In the halls of her high school, Takane Takamine is revered as a goddess. As student council president, she captivates everyone with flawless grades, superb athletic talents, and striking beauty—including Koushi Shirota, a completely average student who has no friends and no real social life. But Koushi eventually uncovers the true secret behind Takamine's dazzling success: her underwear. Whenever she takes it off, she is able to erase any of her past actions. And now that Koushi is aware of this, Takamine has no plans to let him off the hook so easily…

In his pursuit of filmmaking, Junpei Manaka stumbles upon a striking moment in middle school when he catches a glimpse of strawberry-patterned underwear against the backdrop of a sunset. Believing the girl to be his classmate, Aya Toujou, he makes efforts to get closer to her to recreate that memorable skirt flip for artistic reasons. However, when he encounters her the following day, she appears entirely different from the memory he cherishes. Just as Junpei considers starting anew, he comes across the school idol, Tsukasa Nishino, who confidently reveals she is wearing strawberry-patterned panties that day. Convinced that Tsukasa is the girl he seeks, Junpei devises a plan to confess to her, aiming to become her boyfriend and eventually capture footage of her underwear.

Spring has arrived—the season of love—and Jun'ichi finds it harder than he thought to get a girlfriend. To change things, his friends force him to confess to the gyaru Yame Yukana. However, the outcome is not what he expected. A series of firsts begins!

In "Sora no Otoshimono," Tomoki Sakurai is troubled by a recurring dream in which an unknown angel vanishes into the sky, saying, "The sky has captured me." One day, the dream changes, and the angel descends, urgently seeking his help. While napping in class, his childhood friend Sohara Mitsuki wakes Tomoki and notices his tears. Worried, she encourages him to consult Eishirou Sugata, an older student obsessed with "The New Continent," a mysterious aerial phenomenon that has no explanation. As the anomaly is about to pass over their town, Sugata suggests meeting at midnight to explore Tomoki's dream and gather information about The New Continent. Even though his friends do not show up, Tomoki arrives alone and witnesses an angeloid falling from the sky, who attaches herself to him and declares him her master. Sohara then forces Tomoki to join the New Continent Discovery Club, which Sugata is the only other member of. Together, the three investigate the mysteries of The New Continent, the angeloids, and the girl from Tomoki's dreams, uncovering truths that may be more dangerous than anticipated.

In "Trinity Seven: The Seven Magicians," Arata Kasuga lives a normal life with his cousin Hijiri until she disappears because of a mysterious event known as the "Breakdown Phenomenon." Resolved to stop this phenomenon and be with Hijiri again, Arata enters Royal Biblia Academy. With help from seven girls who are each skilled in a distinct type of magic, Arata starts a journey where anything appears possible. This shounen series mixes romance, comedy, and serious magical adventures together.

Lusty teenager Issei Hyoudou's life takes a sudden turn when a gorgeous girl named Yuuma Amano asks him out. However, her true nature as a fallen angel is revealed when she tries to kill him. His life is saved at the last moment by senior Rias Gremory, who reveals her own secret—that she is a devil. To protect Issei, she turns him into a devil under her command. With this new lease on life, Issei becomes involved in the supernatural world. He joins the school's Occult Research Club, where he meets other devils and learns to navigate a complex existence filled with both devils and fallen angels. In his quest for strength, Issei must discover his true priorities and realize that a devil's path is anything but straightforward.

Takuma was an ordinary gamer, but a twist of fate pulls him into another world—in the body of a demon lord! And nobody is more frightened by this than Takuma himself. He possesses great power, but he's completely out of his depth. So he decides to play the part of the monster he resembles, and accidentally acquires two gorgeous slaves: a curvaceous elf and a cat-eared girl. None of them wished for this situation, but they must learn to work together if they want to survive.

In the South Pacific, a decaying resort called The Voynich Hotel sits on a nearly uninhabited island. The hotel is run by its owner, former Mexican wrestler Kandre Umeda, along with two enigmatic maids, Elena and Beluna, and a homicidal chef named Amelia. Taizou Kuzuki, a Japanese traveler escaping his troubled past, checks into the hotel. He quickly discovers that the island's strange residents and bizarre events are even more surreal than anything he has previously experienced. Taizou becomes involved in the island's intricate relationships, building connections with many of the locals and helping them, though this often creates additional problems for him. When his past catches up and threatens to overwhelm him, his new allies come to his rescue.

Ichitaka Seto is a 16-year-old high school student who has secretly been in love with Iori Yoshizuki, a classmate who gained popularity after being featured in a magazine. Despite his feelings, Ichitaka has not confessed due to a painful rejection in his past. His opportunity for a connection arises when he is paired with Iori for the Freshman Welcoming Ceremony. After some initial difficulties, Ichitaka and Iori build a good relationship. However, the situation changes dramatically when Ichitaka's childhood friend, Itsuki Akiba, unexpectedly arrives and moves in with him. This sudden development complicates the relationships among the three from the very beginning.