Kakizaki Hajime

A university student at a third-rate university in Tokyo. He has a strong libido and buys erotic games and adult videos every month to masturbate at home. Although he is a virgin, he has a wealth of sexual knowledge and hopes to one day engage in various kinds of play with a woman. He posts his fantasies on a secret account that he calls his "sex diary".

He is generally a cheerful person who often makes silly quips and remarks, but he is serious and considerate of others, and takes good care of Minerva. He has one younger sister. His family does not know about his sexual preferences, so they think of him just as the "playful eldest son."

He quit his part-time job because the schedule no longer matched with his studies, but he is running out of money because he bought too many erotic games and adult videos. Half asleep after staying up all night, he applied for a part-time job, which led to him participating in the mission.