Tatsuro Ikeyama is a neurology lecturer with obsessive–compulsive disorder and a compulsion for inappropriate behavior. For example, he fantasizes about dumping the load of a dump truck stopped at a traffic light and swinging on a chandelier at his school reunion. His father-in-law is Dr. Nomura, the faculty head at his university and the head of the university hospital's surgical department. The treatment that Irabu prescribes for Ikeyama includes farting in a crowded elevator, changing the television channel to a baseball game while his extended family is watching opera, and finally, removing his father-in-law's wig in public. The cause of his compulsions is his controlled lifestyle; before he was married, he enjoyed playing pranks and watched baseball instead of opera. After his vitamin shot, Tatsuro appears as a multi-colored chameleon who often turns invisible.