A Villain's Guide to Saving the World - Chapter 15: The Great Villain! When the Good Guys Tag-Team...?

A tale of an ordinary senior high school student who becomes a legend by dispensing plagues and controlling vicious virus insects.

In the middle of a deserted island, a small boy wakes up with two sets of memories: one from his few years of life and the other from a man who lived to adulthood and achieved great things. When he least expected it, a powerful master appeared on the island and took him in as a disciple, revealing a shocking fact: magic exists in that world, and, thanks to it, humanity managed to conquer the galaxy.