My Youth Romantic Comedy Is Wrong, As I Expected @ comic, Vol. 10 (manga) — Wataru Watari

Hachiman's cold approach to problem-solving has caused a rift in the Service Club when the group gets a new request: Help Iroha Isshiki, a candidate for student council president, not get elected! Yukino's idea is to run for president herself and prevent Iroha from getting votes, but could that decision lead to the permanent end of the Service Club? The problems keep piling up, and for Hachiman, figuring everything out also means confronting his own unpleasant past.