NTREVENGE

Souichi Sakuraba, an introverted high school student, faces relentless bullying from his "Yokai" classmates. The torment reaches a new low when they defile Azusa, Souichi's childhood friend and sole confidant. In his darkest hour, Souichi meets Asmode, a succubus with mysterious powers. He forms a pact with her to seek revenge by making the bullies' loved ones suffer as he did, through acts of infidelity. Thus begins his explicit and vengeful campaign of "NTR" (Netorare). Original Manga: Yanmaga Web.