After his father was killed in an accident and his sister was injured, Shun Tokinoya works at an esports cafe. While the cafe is in debt, he and his friends hope to win the "Xaxerion Championship" in order to repay their debts.

A hoard of vicious demons known as "Oni" come knocking on her doorstep, threatening the lives of everyone in the Kingdom, they are saved by a lone traveler named Kibitsu Mikoto who slays these monsters with a mysterious "Peach Eye."