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Yuuma Azawa is a new student with a strange habit that he can't quit: apologizing without end. Despite classmate Keiko Arisu's attempts to intervene, Yuuma continues to apologize. Suddenly, Keiko is stalked by a frightening girl who threatens to devour her brain. In a panic, Keiko runs into traffic and is badly injured. In the hospital, Yuuma visits Keiko and confesses that the girl following her is his younger sister, Chizumi. As Keiko strikes up a friendship with Chizumi, she uncovers Yuuma's disturbing past: he once summoned a devil and became consumed by the idea, using his apologies as a form of sacrifice. Although terrified, Keiko returns to school, only to witness people's brains liquefying out of their skulls in a macabre display. Chizumi claims that this is due to Yuuma's never-ending apologies. Keiko barely avoids the same fate, but the tragedies that befall those around the demonic siblings grow worse and more frequent. Included in this manga is a one-shot called "Saikai, Daichi no Ko."
Shiyeon Choi finds herself trapped in a romance simulation video game where she can date attractive men without any hassle. However, the male leads turn out to be impolite, prompting her to aim for a "Bad End" for each of them. Although she wins the game, Shiyeon is reset to the start. On her next attempt, she plans to have a carefree life and ignore the male leads altogether. Will she be triumphant or succumb to the allure of romance once again?
Tsubaki, born into wealth, was allowed free reign by her parents to party as much as she pleased. Having a large social circle made up of both friends and male companions, it seemed as though high school life would be a blast for her. But everything changed with the arrival of Kazumi – the infamous male housekeeper who was renowned for his strength and intimidating demeanor. Despite his fearsome reputation, Kazumi proved to be an excellent cook and cleaner. However, when he declared that he would break Tsubaki's spirit, her life was turned on its head. One-shot included: Volume 1: Love Derby.
Kairi and Momo are having a great time at college, but Sae has been left behind because she didn't pass her final year of high school. Sae wishes she had attended classes more often. Follow Sae as she makes her way through high school once again and reconnects with her childhood love. The included one-shot is Volume 3: Love♥Charge.
Two men have a heated conversation on a rooftop, but appearances can be deceiving. Souta Aoki, a kind-hearted young man, has fallen for Mio Hashimoto, his classmate who always smiles and does good deeds. His heart sinks when she lends him an eraser with another student's name, Ida, engraved on it. When Kousuke Ida sees his name on the eraser, he thinks Aoki has feelings for him. Aoki has to sort out this misunderstanding on his own, without revealing Hashimoto's affections for Ida. As fake and genuine emotions mix, misunderstandings run rampant in this intense love triangle of first crushes.
A person named Aoi identifies as androgynous and is faced with difficulty in fulfilling their desires due to a troubled past. Meanwhile, Takano, who is known to be harsh, constantly attempts to flirt with Aoi. Initially, Aoi ignores Takano's advances.
Uta Naruse's original affection for her childhood friend, Kaoru, was shattered when Kaoru married Uta's elder brother, Reiichi, whom Uta also held in high esteem. Due to various reasons, Uta is now living with the blissful newlyweds, but one year under the same roof as her crush is making it increasingly difficult for her to manage her emotions. Her loyal confidant, Kuroe, is the only one with whom she shares her concerns. Though plagued by what she thinks is an endless unrequited love, Uta cannot seem to find closure. Recent events suggest that there may be underlying issues in Kaoru and Reiichi's relationship which they are hiding behind their apparent happiness.
It's been thirty years since meteorites from space turned everyone on the Earth gay. In a world where heterosexuality no longer exists, Kazusa Takanashi falls for her childhood friend Ayumu–a boy. Though she's doing everything she can to act normal whenever they hang out, her love for Ayumu is growing stronger by the day. How much longer can she hide her secret feelings?
1. Tsumi Koi (Sinful Love) 2. Koi ni Ochiru made 3. Yume de Aimashou 4. Kingyou no Namida 5. Koi no Jumon 6. Tsumi Koi Bangai-hen