He Was Supposed to Be the Cheat Protagonist of a Dating Sim Game, but All the Heroines Were Taken by a Reincarnated Mob Character. So, He Becomes the Worst Villain and Seeks Revenge

Native title: ギャルゲーのチート主人公だったはずなのに、転生してきたモブにヒロイン全員を寝取られ全てを失ってしまったので、最悪の悪役になって復讐します