Yuzuki Hayato is a 24 years old attractive young man with black hair and a pair of teal eyes who worked as a teacher. Due to his parents' death when he was a college student, as the eldest of his family, he takes the responsible to take care his three little brothers : Mikoto, Minato, Gakuto until now. Fortunately, his little brothers often help him doing the house chores and don't want to be a burden to him. After all, he's a gentle and passionate guy who always prioritize his little brothers.