Age gap

High school student Kyuta's second cousin is Etsuro, a calligraphy teacher and womanizer who for some reason sexually harasses him as well. One day though Etsuro gets injured while protecting Kyuta, so Kyuta comes to live with and take care of his cousin until the injury heals. Will a closer relationship develop between Kyuta and that “good-for-nothing” Etsuro?

Fuji Azuma is thrilled to have the chance to spend two whole weeks with his adorable 8-years-younger nephew Taira, head over heels for the kid and the proudest uncle there ever was. But when he learns at the end of their time together that Taira and his mother are moving overseas, he’s shocked to receive a parting kiss and a vow that Taira won’t return

A high school boy who's always considered himself to be an alpha finds out that he's an omega?? And his destined partner is a kid?

Minato is a third year middle schooler with a girly face. He came out of the closet in front of his family and told them that he is gay...since then his mother started bringing him cute/girly things which somehow dissapointed & hurt Minato's feeling. Living beside beach his family runs a bread & breakfast where he meets a new guest Naoki Oisaka whom he started feeling comfortable with.

Saeki always had a thing for straight, younger men. When he's tasked to go undercover as a teacher at an all boys school, Saeki is thrilled at the chance of being around so many of them. But his plan goes awry when he's seduced by Kei, the subject of his investigation. To make things worse, Kei discovers Saeki's true identity and threatens to expose him. With no choice but to agree to Kei's demands, Saeki is frustrated with the restrictive arrangement. But he soon realizes his attraction to Kei