Taiyou, a handsome and well-liked individual, finds himself tasked with looking after his cousin Tsukihiko, who attends the same university. Despite Tsukihiko's constant rudeness towards him, Taiyou remains patient. However, beneath his composed exterior, Taiyou struggles to contain his building frustration. Unexpectedly, Tsukihiko confesses his feelings to Taiyou and leads him to an empty classroom, where things take an unexpected turn...