Yamashita ends up at the home of his hard-drinking boss, Takaoka, and misses the last train while keeping his drunken host company. With nowhere else to go, he stays the night and finds himself captivated by Takaoka's wife, Satsuki. Trapped in a sexless marriage, Satsuki secretly masturbates to ease her frustration. When she notices Yamashita spying on her with a hard cock, she gets wildly turned on and makes a move on him. Completely bewitched by her, Yamashita later returns to the Takaoka home on another errand...