Ichika, the eldest of four siblings, single-handedly manages all household chores while her parents work full-time. Utilizing her reliable domestic skills, she works as a dispatched home care service provider. Her first regular client is Tamawa, who initially requested her assistance for housekeeping but gradually began showing interest in Ichika herself. One day, Oshima arrives, pretending to be a visitor. Known for his expertise in tight bondage, his true intentions remain unclear.