Due to "family circumstances," Kondou Makoto is living with his childhood girlfriend, Narasawa Yui, and her mother. Although Yui is obviously attracted to her "onii-chan," he remains oblivious and pursues the numerous girls who conveniently cross his path, providing them with help, comfort, and of course, sexual healing. Eventually, he finds himself seriously attracted to a girl named Izumi. What will become of Yui and her lifelong crush on Makoto? Will Aritomo the rich snob catch Yui on the rebound? Will Yoshiki the perverted photographer get incriminating photos of every female in their school?