Satoru, a wealthy old man, made a fortune in one generation after starting his own company, and is now the chairman of the company and is about to retire from the front line. With only a short time left in his life, he has no use for his inheritance. Mio and Sei hear about this through the grapevine and come to see him for the first time in over 10 years since they were children. They were close as children, but now they fight and say nasty things to each other because they want the inheritance, and they try all sorts of ways to seduce Satoru and get on his good side.