An amateur girl with her face exposed experiences a first-time bubble-washing penis experience in a mixed-gender open-air hot spring (IENE-517)

In hot spring inns that offer bathing services, a 100,000 yen tip is offered for wiping a male guest's body for 10 minutes in the mixed-gender open-air bath. With such a reward, even an ordinary woman draped in a towel would be willing to try. However, under the unreasonable demands of a rude male guest, the inability to refuse actually results in a bubble bath experience?