Mio is an only daughter who helps out at her family's hot spring inn. While she's cleaning the bath, the little boys from the neighborhood who live in the hot spring town always come to play. As she washes the little boys' bodies enjoying the free bath, her sexual desires begin to rise. She washes the chairs just like a soapland, gives them periscope blowjobs, scrubs them with a scrubbing brush, and washes their whole bodies with mat play, and then has sex with them over and over again, cumming inside them with their hard-on little dicks!