During a summer of extreme heat and power shortages, a 25-year-old salesman meets Seto, a tall, curvy married woman transferred from the Tohoku branch for the season who becomes his boss. After work they go drinking, and she explains that she cares about her health and hates restrictive bras, so she usually goes braless. She gets very drunk and presses him between her huge breasts; as a devoted big-tit fan, he loses control, beginning a scorching, sweat-soaked affair in which they fuck again and again for 17 tightly squeezed ejaculations.