Staying as a guest at a married couple's home in Tokyo through a connection with my father, I find myself suddenly alone with the wife, Yukari, when her husband has to leave for a three-day business trip. Yukari, who always exudes a sensual aura, takes this opportunity to seduce me. While reading a piece of literary fiction, she becomes intrigued by the theme of "forbidden love" and unexpectedly makes a bold advance. Unable to resist her temptation, I feel my body instinctively respond despite my nervous excitement. With just the two of us in the house, tension builds to new heights, leading to an intense and inevitable encounter.