As a child, Masamune Makabe once suffered greatly at the hands of a wealthy and beautiful girl named Aki Adagaki, who nicknamed him "Piggy" due to his chubby appearance. Seeking revenge against his tormentor, Masamune works hard to improve himself and returns as an incredibly handsome, albeit narcissistic, high school student. When he encounters Aki once again, he is prepared to exact vengeance.
With the aid of the rich girl's maid, Yoshino Koiwai, Masamune slowly begins to build his relationship with Aki, intending to break her heart when the time is right. However, as his friendship with Aki begins to grow, Masamune starts to question the objectives of his devious plans, and if bringing them to fruition is what his heart truly desires.
Masamune-kun's Revenge OVA.
The AT-X version of the broadcast starting January 7 will feature its own original ending video, as well as a bonus program after each episode titled "Honmono no Ojou-sama wa Dare da?! Ojou-sama Kakuzuke Check" (Who is the Real Lady?! Lady Ranking Check). The bonus program will center on Aki and the female cast as they try out a variety of dishes and judge which is of high class.