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!Utsumi has finally made up with Kurokawa after they share a kiss. However, after Utsumi learns that Shou-sempai, his first crush, has feelings for him now, he finds himself unsure how to proceed. And with the arrival of summer vacation, Utsumi tries to find a way to verify how Kurokawa feels about him...