husband's friend

Ryoko was loved by her husband, loved him, and lived a happy life, although it wasn't a luxury. My little pleasure is eating cake alone... One day, her husband Tooru brings a friend. The two of them are surprised when they exchange greetings and look at each other's faces. That friend turns out to be Hanaoka, the man Ryoko loved in the past. Toru asks for Ryoko even though Hanaoka is sleeping in the next room. Ryoko has no choice but to accept, but Hanaoka's eyes are staring at her through the narrow sliding sliding door...