"Hibiki" is cheating on her husband without his knowledge. Although there's no concrete evidence, the husband feels something is off with his wife's behavior. His distrust towards "Hibiki" grows, but he can't get any solid proof... He tries to trap his wife into admitting it, but fails to get any incriminating statements. Desperate to catch her in the act, the husband says he's going to work and hides to spy on his wife. Then...
