Yuusaku is a male student in Ryuuji's class and his best friend. He serves as the vice-president of the student council, the class representative, and the captain of the boys' softball club at school. Yuusaku wears glasses and possesses a diligent personality. He believes he is poor at talking to girls, although Ryuuji observes otherwise. During his tenure as student council vice-president, he eventually falls in love with the student council president, Sumire Kanou. A running gag involves him appearing out of nowhere behind Taiga and Ryuuji when they are discussing a "plan of attack" to pursue their crushes. Like Minori, he has an unusual personality, but it is often an expression of his friendship and appreciation.
Spoiler
Yuusaku has feelings for the class president, Sumire Kano, but was rejected as she had a scholarship and would be leaving the country.
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