Three childhood friends embark on a road trip where Satoshi harbors feelings for the tomboyish Hinata but chooses to keep them hidden to maintain their close relationship. However, a night-time misunderstanding leads to a shocking revelation as Hinata confuses Satoshi for Shou in the dark, exposing a secret affair between her and Shou. This unexpected turn of events complicates their bond and sets the stage for emotional turmoil and introspection.