At a time when everyone around him is beginning to yearn for “love,” Mori is more interested in things like “slime molds." One day, Eri Yoshida transfers from Tokyo to Mori's school, and her dainty looks attracts a lot of attention. Mori's friend invites him to follow along as another boy wants to try to ask Eri out. He refuses at first, but when he sees the confession scene, unexpected feelings arise...?