DASS-539 Swapping NTR: Only I Can't Have Sex Azusa Tani Serina Usui

Azusa's husband, Koichi, loves his wife, but recently he has been losing his erection during sex. When he consults his best friend, Hajime, about it, he is suggested to swap partners, with his girlfriend, Serina. Koichi is surprised at first, but decides to swap partners to get his erection back.