Yui, a housewife living with her taciturn and serious husband. Her husband has always been indifferent, and both his daily life and nightlife lacked excitement. Recently, she had become close with the neighbor's wife, frequently having meals together. Her husband also seemed to get along well with the neighbor's husband, and they were getting along as couples. One day, while Yui was having tea with the neighbor's wife, the husband came home. The doorbell rang, and when the wife left her seat, the husband suddenly kissed Yui. Yui, who lacked excitement in her daily life, was confused but did not feel bad about it. However, feeling awkward, she decided to keep her distance from the neighboring couple as much as possible. One day, her husband suggested attending a dinner with the neighbors, and Yui couldn't refuse and participated. After having some drinks, the dinner proceeded. Then, her husband and the wife passed out drunk. As if waiting for this moment, the neighbor's husband embraced Yui and gave her a passionate kiss. Then, he showed Yui his erect groin, and she couldn't help but get excited and started to suck on it. She then experienced sexual acts that her husband could not provide, reaching climax multiple times...
