After five years of marriage, I finally managed to take a long vacation and went on a trip with my wife, Yuki. The resort hotel we stayed at was a famous place with a casino, and Yuki seemed genuinely excited. But instead of paying attention to her, I was absorbed in work, completely oblivious to her feelings. Without my knowledge, Yuki met another man by the pool, and their relationship gradually deepened. By the time I realized it, she was already engaging in bold acts with him at the night pool.