I got drunk at a work party and woke up to find myself alone with the receptionist Mitsuha... She was so innocent but horny that she started courting me, and I forgot about my reason and my girlfriend and ended up having sex with her over and over again until the morning... Mitsuha Asuha - Mitsuha Tomorrow

The movie revolves around a workplace affair between the main character, Yuki-san, and the receptionist, Mitsuha. After getting drunk at a work party, Yuki-san finds himself alone with Mitsuha, leading to a passionate encounter. As they navigate their feelings for each other, they must confront the consequences of their actions, including Yuki-san's existing relationship with his girlfriend.