Lately, my wife has been acting strangely... A wife who rashly fell into an affair lost something important in the process. / Hibiki Otsuki SAN-150

Hibiki is having an affair behind her husband's back. Although there's no concrete evidence, the husband senses something is off about his wife's behavior. One day, he witnesses a strange man leaving their house. Hibiki's distrust intensifies, but he can't get any concrete proof... He tries to interrogate his wife, but fails to get a confession. Desperate to catch his wife in the act, the husband says he's going to work and hides behind some belongings to spy on her. A while later, her lover arrives and becomes intimately involved with Hibiki... The husband, enraged, grabs his lover by the neck, and she collapses, motionless. Hibiki, terrified, is attacked by her husband, but overwhelmed by fear, she pulls a knife and stabs him in the chest... Hibiki's screams echo through the room.