From the creator of the surprise-hit romantic comedy Domestic Girlfriend! High school student Eiji is in love with Aki, the head of the tennis team, but he is unable to ask her out. Another student, Yuki, discovers his obsession with Aki, and promises to help him get closer to her…but Yuki’s help comes at a cost, and soon, the analytical, strategic Eiji finds himself deep in the messy turmoil of emotion…
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! After randomly running into Kurokawa on Christmas, Utsumi is able to view the light display with her as he'd hoped, and neither of them realizes that Kurokawa's ex-boyfriend, Toru, was there as well. However, Utsumi quickly becomes depressed as the reality sets in that Kurokawa doesn't seem to share his feelings anymore. As he's spending New Year's on his own, his first crush, Shou-sempai, appears to fill the hole in his heart once again...