The eldest of four siblings. Ichika, who used to help her parents who work together to do housework, makes use of her special skills to work as a temporary staff for a housekeeping service. Tamawa is the first customer to appoint Ichika, who has just joined the company, and has been a regular customer since then. However, the purpose of such Tamawa is her body, not housework. "Is she your next target?" The person who came disguised as a visitor was Oshima, a bondage maniac.