Seishun Girigiri Overline summary: "You're gonna regret it if you stay with me". Oshima heard the rumors that his boyfriend, Hiyama, is quitting baseball. Upon hearing the upsetting news, and after being told that he's a nuisance to the baseball team and his boyfriend’s career, he tries to convince Hiyama to stay on the team. What will happen to their clumsy love story after they graduate high school?!