Cuckold Hot Springs Vacation - Bursting With Adulterous Passion Under The Steam Eiko Kato

After 40 years of working while sacrificing time with his family—. A "hot spring trip" planned by his daughter Fuyumi's husband Taro to celebrate Akio, who has happily retired, and to thank Eiko, who has supported her husband all along. Excited about a family trip they could never take during Akio's working days, and feeling grateful to Taro, the group arrived at a certain hot spring town. Upon reaching the inn, Eiko immediately soaked in the hot spring with Fuyumi. However, a man watched Eiko's body with suspicious eyes. Who was that man...!?