Taiki Inomata loves badminton, but he has a long way to go before he can reach nationals. When Taiki sees upperclassman Chinatsu Kano practicing her heart out on the girls' basketball team, he falls for her hard. After an unexpected turn of events brings the two closer together, sports might not be the first thing on their minds anymore!

As summer draws to an end, Taiki realizes he may never be able to close the gap between himself and Chinatsu. He takes her to the beach to celebrate her birthday anyway, hoping to cheer her up after a grueling loss. However, their adventure goes awry when an unexpected storm forces them closer than ever before!