Kamio, a basketball team member, has harbored feelings for Kitano, their manager, for as long as he can recall. The train ride back home is a cherished moment for him.
However, one day, the train abruptly halts, causing Kamio to accidentally touch Kitano's chest. Alarmed, he discovers that his left hand is no longer under his command, acting independently. In a last-ditch endeavor to regain control, Kamio begs Kitano to permit him to grope her chest anew.