Takeshi and Daisuke are two close friends who have been together since they were children. Recently, the sex life of both families has decreased. There is no longer any sexual desire, causing the marriage to become deadlocked. Faced with this situation, Daisuke immediately asked Takeshi... to exchange wives. On the occasion of the two families gathering together, Takeshi immediately told Sakura about Daisuke's proposal. Sakura was a bit hesitant, but after being persuaded by Takeshi, she agreed. So Takeshi and Yuna will proceed first, and Sakura and Daisuke will witness the two. Watching my husband fuck another girl naked right in front of her husband. They didn't even wear a condom and her husband ejaculated straight into Yuna's uterus! Not only that, Daisuke also took out his cock and pumped it right in front of her. Seeing another man's cock made her even more horny, her panties were soaked without even realizing it. And after the two of them took a shower, she and Daisuke went into the couple's bedroom and fucked each other right there. After this time, Sakura is no longer as shy as before. All four of them were always comfortable being naked in the house, playing cards and "guess the cock" with each other, fucking each other whenever they wanted. The relationship between husband and wife seems to gradually become closer...