Jul 22 (Anime Explained) - 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.