A man who was once called the world’s strongest agent ended up becoming a teacher after his retire...
- Author: Neko Kouichi,Yoshino Sora
- Genres: Action / Adventure / Comedy / Drama / Fantasy / Harem / Martial Arts / Romance / School Life / Seinen / Supernatural / Tragedy
10 years ago, after “the Gate” that connected the real world with the monster world open...
- Author: Jang Sung-Lak,Gee So-Lyung
- Genres: Action / Adventure / Fantasy / Webtoons