Kizuna: Much Ado About Nothing

Kei Enjoji and Ranmaru Samejima, a loving couple, have been together since junior high. They're now adults living together, seemingly content with their life. However, the morning after a night out, Kei's drunken state sparks Ranmaru's suspicions when he finds lipstick on Kei's chest, makeup on his clothes, and a love hotel matchbook in his possession. Ranmaru's world is turned upside down upon receiving a phone call from a woman asking for "Kei-chan", forcing him to confront the possibility of infidelity.