Invited by her senior colleague on a hot spring retreat, she expected a relaxing company trip with coworkers from different departments—originally planned to bring their spouses along. But something felt off from the start, influenced by the atmosphere and the way her seniors acted. "Did you read about the healing effects of this hot spring? It says it's good for... fertility." Amid such conversations, her wife is brutally taken against her will. Yet—no, it can't be true... she hates this... but she's sinking into an irreversible pleasure, revealing the woman's true nature. Unexpected temptation shakes her heart. As conversations and the hot spring ambiance deepen, their relationship begins to shift. Amid warmth and passion, new emotions start to bloom. The mood of the place, combined with whispers of the spring's miraculous properties, draws them closer. Conflicted deep inside, she's gradually consumed by this pleasure. A strange and passionate night at the hot springs, where warmth and desire collide.