Uwaki to Honki The Animation  

浮気と本気 THE ANIMATION

Keita Sasahara's friend Mika Kuramoto introduced him to her close friend Riko, who they soon fell deeply in love with. However, two months into their relationship, things took a turn when Sasahara witnessed Riko kissing another man. Later that night, he went out drinking with Kuramoto and some other friends before heading to her apartment. On the way home, Kuramoto discovered that the man who was kissing Riko was actually Shunpei, her own boyfriend, adding an unexpected twist to the story. As they drank away their grief together, the sexual tension between them grew, resulting in a passionate and erotic evening.