After an accident sent her family to their deaths in the ocean, Hinako Yaotose keeps returning to the thought of sinking forever into the sea herself. With Miko Yashiro as her only friend, Hinako manages to keep up a semi-happy facade, but whenever Miko leaves her side, she slips into despair. Everything changes one summer when she meets a mysterious girl with eyes as deep and clear as the sea, drawing Hinako in like nothing else has in a long time. During her absent-minded search for the girl, Hinako is suddenly pulled underwater by a beastly deep-sea creature, only to awaken to the presence of the girl—Shiori Oumi—who takes on a monstrous form and kills Hinako's attacker. Despite this heroic act, Shiori's intentions are no different from any other monster's: she wants to eat Hinako. The following morning, Shiori walks into Hinako's class as a transfer student, and Hinako cannot help but smile—at last, someone who could fulfill her quiet wish for death has appeared before her.

A spin-off of Yuru Yuri featuring Sakurako and her sisters.

As Hanabi Natsuno returns home after six years in Tokyo, memories flood into her. As she prepares to start high school, she moves to Tachibanakan, the local dormitory for female students. Upon her arrival, Hanabi stumbles upon a bare naked beauty, and instantly falls head over heels for her. She also reencounters Konomi Fujiwara, her childhood friend who she barely remembers. Hanabi is introduced to the other residence of the dorm and quickly becomes the center of attention. As the girls instantly take to the newcomer and begin shooting for her affection—subtly or obtrusively—Hanabi realizes that it is certainly going to be an interesting school year.

Hime Shiraki appears to have it all: an angelic voice, an innocent personality, and an adorable face that enamors all onlookers. However, her cuteness is all a lie—it is purely an act to achieve her self-centered goal of marrying a rich suitor. Though she often plays up her innocence to gain favor from those around her, Hime's facade does not absolve her of responsibility when an accident leaves Mai Koshiba injured. Learning that Mai is the manager of Café Liebe—a cafe themed as an all-girls academy—Hime is coerced into taking up a part-time position until Mai recovers. However, Hime's facade cannot cover up her shortcomings at being a waitress, earning her the ire of one of her coworkers, Mitsuki Yano, the elegant onee-sama who often berates Hime over her mistakes. As Hime struggles to adjust to her new job in addition to Mitsuki's unrelenting hostility, her real personality begins seeping through the cracks.