Yaoi-Favorit

A Company President diagnosed with cancer accidentally transmigrated into a novel, and became the villainous emperor the male lead is going to kill?! On top of that, this male lead is the prince of the enemy kingdom that is being imprisoned by him at this moment…. Feels like he just took a step closer to death! No way! In order to live, I must please him, but I never knew that it wasn’t just simply hatred between us…

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.