In their teenage years, few things can hurt people more than the heartaches that come with unrequited love. Such is the case for Natsuo Fujii, who has found himself entranced by his school's ever-cheerful teacher Hina. Deflated by this unreachable desire, Natsuo humors his friends and attends a mixer. There he meets Rui, a girl whose lack of excitement rivals that of himself. After bonding over their mutual awkwardness, Rui takes Natsuo to her house and asks him to have sex with her, hoping that the experience will stop her friends from treating her like a clueless child. With his hopeless feelings towards Hina still on his mind, Natsuo hesitantly agrees. Equally unfulfilled by their "first times," the two decide to part ways as strangers. However, before he even has a chance to process this experience, Natsuo's father drops a major bombshell: he is getting remarried, and his new wife Tsukiko Tachibana is coming over now to meet Natsuo. As if that was not enough of a shock, her daughters—and, in turn, Natsuo's new sisters—are Hina and Rui Tachibana, the woman he's in love with and the girl with whom he shared his first night. Now, Natsuo must come to terms with the feelings he has for his step-siblings as his eyes open to a darker side of love. [Written by MAL Rewrite]

A normal high school boy Kisaragi Ryuji's peaceful life is turned into an adventure by the return of his second cousin Eriko. Ryuji and Eriko seize a relic box from a black broker. In the box, they find a red dragon girl Rose. In order to protect Rose from the black organization, Ryuji decides to fight using his power as a relic handler.

Seikyou Private Academy, built on the intrigue of traditional occult myths, bears a dark past—for 60 years, it has been haunted by a ghost known as Yuuko, a young woman who mysteriously died in the basement of the old school building. With no memory of her life or death, Yuuko discreetly finds and heads the Paranormal Investigations Club in search of answers. A chance meeting leads Yuuko to cling to diligent freshman Teiichi Niiya, who can see the quirky ghost, they quickly grow close, and he decides to help her. Along with Kirie Kanoe, Yuuko's relative, and the oblivious second year Momoe Okonogi, they delve deep into the infamous Seven Mysteries of the storied school. Tasogare Otome x Amnesia tells a unique tale of students who work together to shed light on their school's paranormal happenings, all the while inching closer to the truth behind Yuuko's death. [Written by MAL Rewrite]

Hope's Peak Academy's unconventional class 77-B is about to have an even more eccentric addition: Chisa Yukizome, an alumna with the title of Super High School-Level Housekeeper—and their new homeroom teacher. Cheerful, passionate, and capable, Chisa immediately sets about correcting the students' problematic behavior and strengthening their relationships. It may not be easy dealing with diverse pupils ranging from princesses and nurses to yakuza and impossibly lucky students, but anything is possible with the power of hope. Meanwhile, Hajime Hinata, an unremarkable boy from the school's Reserve Course, longs for a talent. One day, he has an unexpected meeting with class 77-B's Super High School-Level Gamer Chiaki Nanami, who presents to him a new, hope-filled outlook on life. However, unbeknownst to him, the school's upper echelon is about to execute a sinister project centered around Hajime that will bring Hope's Peak—and the rest of the world—to its knees. Zetsubou-hen chronicles the daily lives carried out at the talent-cultivating academy, and the darkness that lurks beneath. As despair slowly infects hope, plans are put into motion to start the Biggest, Most Awful, Most Tragic Event in Human History, and the end begins. [Written by MAL Rewrite]