Sega Games

The show adapts the official web manga Puso Ni Comi: Phantasy Star Online 2 Comic, which originates from Sega's Phantasy Star Online 2 game. Its story revolves around the 轻松愉快的日常 activities of the ARKS部队 members.

Serval and Caracal encounter a human child while exploring the woods. Traveling together with the child, they encounter other Friends, discover the hidden truths of Japari Park, and become involved in an event foretold to "shake the earth."

In the TV anime adaptation of Phantasy Star Online 2: Episode Oracle, which covers the first three episodes of the five-part game series along with some original content, the story begins with the protagonist and fellow ARKS recruit Afin undergoing their qualification exam on the planet Naberius. During the exam, they face attacks from Darkers, malevolent creatures that threaten the planet. They also encounter a mysterious girl suffering from memory loss, leading them to uncover secrets about Naberius and the surge in Darker activity. Episode two delves into the player and Matoi's investigation into a sinister conspiracy surrounding ARKS’s true origins and objectives. In episode three, the discovery of the planet Harukotan sets off a new mission as tensions rise between its native Shironians and Kuronites due to an unexpected Kuronite offensive. With ARKS reorganized, they set out to uncover the roots of this unrest, only to find that the reality is far more complex and disturbing than anticipated.

In the five linked worlds—Black, White, Green, Red, and Blue—the balance kept by the Halo breaks when it suddenly opens during the World Connect event. This disaster threatens the universe, making the realms call on girls with special abilities, called Exceeds, to fight Ouroboros, an alien force trying to speed up the cosmos' destruction. Among those chosen is Saya Sougetsu, from the Blue World, Earth. Seeing this as a chance to help, Saya joins the defense forces, where she meets Amane Ayashiro, also from Earth, along with fighters from the other worlds. To face the powerful enemy, the girls must show that their new alliances are strong enough to protect the future.

In the year 2027, Phantasy Star Online 2 has become the central focus of social life at Seiga Academy, captivating nearly every student except for Itsuki Tachibana, a well-rounded individual who avoids video games entirely. As debates arise over the game's influence on the student body, the meticulous student council president, Rina Izumi, steps forward in its defense. She appoints Itsuki as vice president, assigning him the task of mastering the game while still maintaining his academic performance. His duty is to record his daily progress and evaluate whether the game holds real value for her. With the fate of Phantasy Star Online 2 at stake, Itsuki must rise to meet the challenge.

In the magical realm of Naral Island, a new Demon Lord arises each generation, only to be vanquished by a chosen Hero. The current Hero, Juulia "Yusha" Charldetto, is finishing her quest alongside her companions: the devoted priest Seiran "Seira" Élénoir, the mysterious mage Meiza "Mei" Endust, and the spirited warrior Fai Fai. During their final battle against the Demon Lord, Yusha's group attempts a dangerous spell meant to send their enemy backward through time. The spell misfires, hurling Yusha and her team into an era where the Demon Lord has not yet appeared, and before Yusha herself became the Hero. Stripped of their memories of the future, the four girls begin anew, once again dreaming of assembling the Hero's Party and defeating the Demon Lord. However, the Demon Lord is also transported to the past but retains her memories. She assumes the guise of a young girl named Mao and takes a teaching role at the adventurer academy, scheming to prevent Yusha from ever becoming a Hero. This sets the stage for Yusha and her friends' adventure as they unknowingly strive to conquer the Demon Lord now hidden among them.