Seiji Utsumi was satisfied with just gazing at his beloved Shou-sempai from afar. But when his classmate, Yuki Kurokawa, finds out about his crush, she pushes him to take action, and his one-sided love starts moving rapidly! Kurokawa's past romance is weighing heavily on Utsumi. But his love for her lets him overcome his fears, and he confesses his feelings at the school culture festival. Kurokawa accepts his feelings, and they finally become a couple. But the shadow of Kurokawa's ex-boyfriend, Toru, still looms large, and as the new couple deepens their relationship, ripples from the past continue to spread...