Download or read book The Greatest Villain Chapter 21 written by Sujin Kim and published by NETCOMICS. This book was released on 2019-04-30 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completed series: Kindle edition: 11-chapters set; paperback: 1-volume set. 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. Faithfully following the two rules, Sawoo writes Kido many letters in the hope that he will get to learn the last remaining rule but Kido never replies. One day after four years, Kido shows up in front of Sawoo, thinking those were love letters.