Tokumei sister: Nettori ero shioki.

Arisa, the dominatrix of an S&M club, had debts from giving money to men. Pursued by the debt collector Takemoto, she hid in a church confessional. After explaining her situation, the priest, impressed by her strong, dominatrix-like personality, appointed Arisa as a special envoy sister. Her purpose was to use her own body to save lost souls.