When Sawoo gets bullied in high school, his only friend Kido promises to teach him how to become the greatest villain. But Kido goes overseas after teaching Sawoo only two of the three rules. Sawoo is still determined to become the greatest villain, so he writes Kido many letters in hopes of learning the last rule. Kido never replies. Four years later, Kido returns from overseas, and he wants something more than just friendship with Sawoo. ⓒSujin Kim, NETCOMICS All rights reserved. Published by Tappytoon under license from partners.