Dai finds his crush on his sister-in-law Komugi growing by the day. But suddenly, Dai’s classmate Yoshino kisses him—right in front of Komugi, no less! Komugi, totally oblivious to Dai's true feelings, starts pushing him to pursue Yoshino. While Dai wants to set the record straight, he also comes to realize that dating Yoshino would be healthier anyway, so he invites her out on a date. Meanwhile, Yoshino, aware of Dai’s crush on Komugi, drafts a plan to defeat her rival…