Koibito Ijou no Koto wo, Kanojo ja Nai Kimi to.

Yamase Fuyu, exhausted from his monotonous job, meets his former college girlfriend, Ito, and invites her for a drink. They reminisce and share their current frustrations. As the night progresses, they give in to their emotions and have a one-night stand. Fuyu feels regret, but Ito dismisses his apologies and refuses to discuss fixing things. Both are weary of societal expectations and the pressure to act mature. They decide to create a unique bond centered around doing whatever pleases them, avoiding responsibilities like work or relationships.