Watari-kun's ****** Is About to Collapse Vol. 4 (Kodansha, 2020)

Naoto received an unexpected love confession from Ishihara-san, the girl universally adored by his class. While it was supposed to be a happy occasion, Naoto couldn't give her a definite reply because of his rocky relationship with his childhood friend Satsuki. Naoto doesn't want to hurt anyone, be them his sister or his childhood friend. Just what will be Naoto's reply to Ishihara-san's confession?! Shortly after making another crucial decision, Naoto ran into a girl he seemed to have seen somewhere before!! Naoto thought that everything was going to work out, but now, his high school life is about to get shaken up even more.