"Just once, I want you to pretend to be Rio's lover..." My best friend Yuu suddenly says, leaving us stunned and unable to hide our shock. My wife Rio, who had been feeling that daily life lacked excitement, seemed genuinely intrigued by the idea. I, on the other hand, felt uneasy and hesitant. I assumed Yuu would return home the same day, but he ended up staying overnight after winning over his mother's approval. What awaited us was an unimaginable turn of events...