A newlywed couple decided to go on a trip to an onsen (hot spring) run by the husband's older brother. The wife, Yuri, was looking forward to this day. Naturally, she also anticipated sex with her husband. However... In front of her single brother-in-law, she ended up giving in under the influence of alcohol. An adulterous relationship over two nights and three days at the onsen inn. Her brother-in-law repeatedly sought her out without her husband's knowledge. Before she knew it, she found herself drowning in the pleasure with her brother-in-law...
