The newly moved-in wife from the upstairs apartment, with her irresistible big ass, has her husband completely smitten. One day, a guy spies on her rear from the staircase when she accidentally stumbles, falling down and crushing him beneath her shapely buttocks, causing injury. As a result, the guy ends up having to care for her. Taking advantage of the situation and driven by desire, he uses his injury as an excuse to get closer to her curvy backside... An unexpected turn of events awaits.