One day, at the age of seven, Rio discovers that he has been reincarnated as a villain named Rio Gran Arnold. Rio appeared as the middle boss, fighting against the main characters, and when he lost, he was expelled from his home. But of course, he doesn’t want this. He was born into a rich duke’s family, and he did not want to give up this life of debauchery, being served by a maid with big breasts. Rio, feeling this way, summoned a demon to curse him so that he would not be able to go to the academy, and he would not be involved in any of the events of the story. As a result, Rio was able to live a peaceful life, but the story had a bad ending as a result. ‘…… something, I don’t understand , but the heroines’ eyes are dead. The main heroines fell into s*avery, fell into demon depravity, or regressed into infancy to the point of uselessness. 　 This is the story of Rio, the villain, saving those main heroines.