The bud of bittersweet first love takes bloom! A mysterious boy comes to Saku Fujigaya's rescue when she falls ill on a train, but he leaves before she can thank him. After this experience, Saku never ignores strangers in need of help to emulate the boy who helped her. Haruki has confessed his feelings to Saku, but she wonders if Hazuki may be a better match for him. Everyone in their friend group is attempting to convey love to someone, but those feelings aren't quite connecting!