Hidaka Atsushi and Sakaki Youichi have known each other since senior high school, and are now attending the same college. They share a "rotten relationship", according to Atsushi, who, at one time, gave in to temptation and slept with his friend. Disgruntled about having to play the "bottom" role since Youichi is 20cm taller than him Atushi seeks out a smaller, cute boy to whom he can play the role of seme.