Ijiwaru Shujin no Mitsugi ni Torokeru

A love story between a slightly obsessive young master and a former classmate who's now his maid. Kazuomi Kagami is the center of all the students at a super wealthy private school. For some reason, Kazuomi is attached to Yuito, a normal, average boy. Yuito finds himself becoming friends with Kazuomi, but they go their different ways after graduating high school. Yuito's father goes deep into debt and Kazuomi offers him a job to become his caretaker. Yuito reluctantly agrees to his proposition and ends up in a situation he was not expecting! So begins his days of teasing by his young master, Kazuomi.

(Source: Renta!)