World Teacher - different world style education agent -,
World Teacher - I sekai shiki kyouiku ejento,
월드 티처 -이세계식 교육 에이전트-
A man who was once called the world strongest agent ended up becoming a teacher after his retirement to train the new generation of agents. After many years of training his disciples, he is killed at the age of 60 by the ploy of a secret organization and was reincarnated in another world with all his past memories.