is the protagonist of the series. A generally mannered and composed student in year one, class three, his life becomes complicated when he begins to unfaithfully initiate polyamorous relationships with girls that he is unable to singly commit to. Though he is initially casual, gregarious and understanding, his addiction to sex over time corrupts his personality and he instead becomes more apathetic, rash and egotistical towards others, regardless of interpersonal harm or later consequence. It is hinted on multiple occasions that he is aware of the negative consequences of his actions, but makes no real attempt to remedy them.
Makoto lives with his divorced mother and has a younger sister named Itaru who lives with their father. He is good friends with Taisuke Sawanaga and Otome Katou.
Spoiler!In the anime's final episode, he is killed by his former girlfriend, a jealous and emotionally unstable Sekai, who stabs him to death for being unfaithful to her with Kotonaha; Kotonaha, Makoto's current girlfriend at the time of his death, kills Sekai in return.
His birthday and his surname are derived from Itō Hirobumi.