Older uke (professor) x younger seme (student/lab assistant)
The uke is a professor at an institute, hated by many. Because of his harsh attitude and unforgiving personality, people rarely wants to be his lab assistant. But during one of the rare interviews, he meets the seme—who surprisingly doesn't run away—and ends up hiring him.
The uke and seme have been childhood friends with a two-year age gap. The uke always saw the seme as a younger brother, but the seme felt differently. Before the uke left for Tokyo for university, he caught the seme with a woman. That night, while they shared a bed, the seme touched the uke, thinking he was asleep—but he wasn’t. After that, they went their separate ways and met again two years later when the seme joined the same college.
Ore no Seito wa Kawaikunai