Tokuyoshi Umehara

Keigo, whose mistress is Michiko, 22, is unhappy with meetings three days a week and eventually brings Michiko to his home. The desire for betrayal that was sleeping in his wife Satomi finally exploded due to her husband's abnormality, burst out like a dam, and finally turned into a "double marriage" strategy, far beyond her husband's infidelity...

Harue Hashimoto is a popular mystery writer. She always talks about murder tricks to make it look like an accident with her friends Mayumi Tsukasa, a singer, and Miki Kitamura, an editor. Miki has a habit of saying that she wants to kill her boyfriend Kyosuke Takamaki.