After five years of marriage, I finally took a long vacation and came on a trip with my wife, Yuki. She was happy at the famous resort hotel with a casino, but I didn't bother her and prioritized work. I didn't know how much she had been looking forward to this trip... And while she was acting alone, Yuki met a man by the pool. Before I knew it, their relationship had become something serious. When I realized it, they were doing such a daring act in the night pool...