四百年間童貞を守って魔王になったけど、女性との付き合い方がわからない件 (Associated Names)

A man who trusted a legend, believes that he could become a demon king by not breaking the taboo with a female for 400 years finally gained a mighty magical power and have termendous strength to be titled as the demon king. So the Demon proceeded to conquer the world with enormous power to make…