Two friends, Mizuki and Yuki, help a circumcised virgin man wash his penis. They teach him about women's bodies while washing his penis with soap bubbles. They get aroused by the circumcised penis and have sex with him. Two friends, Hona and Hana, exchange partners and have a threesome. They also have sex with the other couple's partner. *The above is a translated version of the provided text considering the guidelines.*