After 7 years, Kokoro's finally returned to his former boarding school. On the first night, Kokoro sneaks out past curfew to find Chanko, a stray cat that lives in the area. Instead of the reunion he's hoped for, Kokoro gets caught by Hiragi, school nurse and dorm supervisor. With his plan to see Chanko ruined, Kokoro's opinion of Hiragi starts off horrible. However, after Hiragi saves Kokoro from being assaulted, Kokoro feelings about Hiragi change, since he realizes Hiragi was his first love.
Ch.4-5: High schooler Yuusuke's in love with his neighbor, college student Mahiro. Yuusuke is annoyed, when Mahiro constantly treats him like a child or little brother, especially since Mahiro's only 2 days older
Ch.1-4,7: Artist and college lecturer Keisuke finds himself drawn to college student Shiro and gets Shiro to agree to be his model, in exchange for food. However, no matter how many times he sketches Shiro, Keisuke is never satisfied with the result
After 6 years, Tomoya has returned to his old high school as a substitute PE teacher and everything's just as he remembered. Unfortunately, that includes Seta. Seta is the two-faced, art teacher, who always suggestively teased him. When Tomoya accidentally breaks Seta's phone, Tomoya must act as Seta's lover for the 4 months he's at the school, as repayment
Upon being appointed to his new post, patrol officer Sumiragi's assigned as the guardian of Akihito. Akihito is a college student living alone in his parents' large house. The issue is that Akihito has men come over for sex, every night. With Sumiragi living with Akihito, he's quickly able to deter the late night visitors. Since the men no longer come, Akihito's condition worsens. Sumiragi desires to find out the reason for Akihito's actions and how to help him escape his loneliness.
Ch.1-4,6: Nazuna has always been in love with Takumi, his sister's lover. After her sudden death, Nazuna uses his face, which looks like his sister's, to get what he wants from Takumi, even sex. However, whenever they have sex Takumi makes a sad face, but Nazuna can't tell if its directed toward him or his sister
Ch.5: Niimi has been breaking school rules, so he can be punished by guidance counselor Ootsuki
Ch.5: The cute and small Takemiya has clung to teacher Nagita, since first year. Now that Takemiya's a third year, he's gotten big. However, his clinging persists
Cattle farmer Daisuke becomes unnerved, when Yuuki returns to the countryside. 13 years ago, as a high schooler, Daisuke would molest his younger sister's childhood friend Yuuki to satisfy his urges, when Yuuki would visit his family's house. Daisuke wants to forget about his crimes, and hoped Yuuki had already. However, Yuuki wants Daisuke to take responsibility.
Ch.1-4: As a child, Arashi suddenly developed lovesickness, a heart shaped rash caused by an allergy to love. Since then, Arashi has been unable to feel love, due to his lovesickness medication, despite desperately wanting to fall in love. When Arashi mistakenly kisses his childhood friend Haname, while half-asleep, Arashi discovers Haname has lovesickness and is in love with him. Though Arashi is confused at first, after stopping his medication, Arashi notices his heart pounding for Haname
Ch.1-5,7: Kudou teaches at a high school full of delinquents with the worst being Hinami. Despite how rough the environment is, Kudou has no plans on quitting because he's actually an extreme masochist. After Hinami finds Kudou getting off on his desk, he make Kudou his slave, much to Kudou's secret pleasure
Mayoi Neko to Koi no Ashiato