Toudou Masato

To fix Yotsuba's poor academic performance, Masato was hired by Yotsuba's parents as her home tutor. He is a student at an elite university, good looking, excels at sports, and seems to have no faults as a young man.

Yotsuba sees him as a kind and highly capable teacher. As their days of home tutoring goes by, Yotsuba gradually opens her heart towards Masato, but unbeknownst to her, he is two-faced...