Yui lives a mundane life with her serious husband. One day, Yui is summoned by her husband's boss, Sada, and learns that her husband has been accepting bribes from clients. When she offers to do anything for her husband, Sada starts playing with Yui's anus. A few days later, Sada comes to their home and rapes Yui's anus right next to where her husband is sleeping. However, this was just the beginning, and Yui couldn't even imagine that she would awaken to the pleasure of anal sex...
