When you wake up in the morning with a hangover, Aizawa, a naked colleague of yours, is sleeping next to you! why? I can't understand the situation at all! When Aizawa wakes up, he hears the shocking truth that he was attacked by me, who was covered in mud at a drinking party! But Aizawa, who is usually so talkative, seems happy for some reason? Furthermore, we share a secret that no one else knew, and the distance between us grows closer...