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.