A one-night, two-day hot spring trip with a married woman he just met. Miki (30) married her former classmate's older brother (35) when she was 20. This morning, her husband left for an overnight business trip. Seizing what seemed like a coincidental opportunity, she decided this was the moment to make a change. Set in a warm and tranquil hot spring inn, this story captures the emergence of new emotions between the two.