Futaba, who was embraced by Kou, is interrupted by a call from a girl who calls Kou "Kou-chan." As the cultural festival approaches, Futaba, invited to Toma's live performance, finds herself moved to tears by Toma's song, which resonates with her current feelings. Kou, who is with her, tries to speak to Futaba, but... On the other hand, Shuko, who has come to Yoichi's place, takes an unexpected action. Just one millimeter away from youth—will their feelings for each other truly come to fruition?