Meets a beautiful, mature, married woman in a luggage room with a friend she knows well, leading to an affair. (Hyakuna Sarina, DASS-814)

Exhausted by work and family, Shinichi, due to discord with his wife Hitomi and complaints about their sex life, visits a brothel. There, he unexpectedly reunites with his married friend, Sarina, and a secret relationship begins. Initially confused, they gradually develop mutual desires, with Shinichi wavering between family and lust. As time goes on, the gap between him and his wife, who is concerned about her family, widens, while his secret meetings with Sarina become unstoppable.