Newlywed Natsu Shibuya is sexually frustrated because her husband falls asleep without satisfying her. Then a magical old man who brings good fortune appears: sex with him sends stock prices soaring, wins the lottery, and even earns her husband a promotion. Hungry for more luck and pleasure, Natsu transforms into a greedy wife who fucks the skinny old man beside her sleeping husband, making him creampie her again and again.