Valentine's Day approaches. Igarashi and Kurobe help a young man find his way, making Igarashi happy when he recognizes her as an adult. Sakurai plans her usual chocolates for everyone, with the men all hoping to get special heartfelt chocolates this year. Igarashi spends most of the day without Takeda and feels sad, until he invites her to ramen after work. Takeda saves the same young man from thieves and when Igarashi and Sakurai arrive, they realize he is Yüto, Sakurai's younger brother...