Mystari's manga / #Student x Student(25)

Yuzuru, a yankee with a mean face, requests Satomi, his senpai, to "make him his little brother" in order to repay him for helping his family when they had money issues. Yuzuru then starts to follow Satomi around and serve him by tending to his every need. But Satomi is getting annoyed by all the attention, and our Yuzuru won't give up! Until Satomi decides to ask him to sleep with him...

High school student, "Otona-chan" is popular among both guys and girls with his cute looks. But instead of being treated like a child, he wants to be treated like an adult and really admires cool adults. And then comes a student teacher to his class, who is very much adult-like and he falls hard... Ch 3-5 tells the story of a book designer (who is secretly an author) and his clumsy subordinate (who also happens to be a fan of his books).

Part of the Doukyuusei series