Yashiro Ei

Brother of Kei. He is a career police officer employed by the National Police Agency. He is a police inspector.

He may look like a blonde-haired delinquent, but he is a perfect hottie who excels in both studies and athletics. When he was a student, he had a good life with many women.

He has not been on vacation for a long time and has come back to his parents' house.

Even after becoming a policeman, he has not stopped playing with women and has a habit of teasing Kei, who is a virgin and dull.