Ganjjajang (간짜장)

After two decades of battling extradimensional monsters and protecting the world, Lim Dae-in is finally ready to retire and enjoy a peaceful life. However, the morning after his retirement party, he wakes up to find himself back in time… before he even gained his powers. Armed with knowledge of the future, Dae-in is determined to secure his fortune and retire again, but this time within three years.

Once the finest instructor in the Blood Cult, Suryong Baek is killed, only to to wake up in the body of someone who teaches martial arts at a small rural academy. His new body may be weak, but he knows how to fix it, and it’s not the first time that he’s found himself in a body that can’t access its inner power. Curing his body requires money, however, and Suryong decides that becoming the greatest instructor at a top academy is the best way to do it. Since he’ll be up against tough competition, Suryong will have to use everything he’s got to become a teaching superstar.