The Stepsister and Stepbrother's Hot Spring Adventure

A nervous stepbrother is compelled by his dominant stepsister to change into women's attire and endure a six‑month body transformation before arriving at a secluded hot spring inn. As they share the steamy bath, a sudden, unexpected plug heightens the tension and draws them closer together. The story blends seductive power dynamics with a sensual journey of self‑discovery.