An assassin who swore never to kill again - Liola, was being chased by an assassination organization when he accidentally dropped into a parallel universe. In this chaotic, unorganized world, Liola continues to honor his promise. He tries his best to live the life of an ordinary person, but after a series of events occured... He suddenly realized that actually, being an ordinary person is harder than being an assassin!

Liola—the best assassin in his world—has vowed to kill no more. He was being chased by an assassination organization when he accidentally dropped into a parallel universe: through a dimensional gate and into poor teenager Kaiser's apartment. Instead of going to the government shelter for lost dimensional travelers, Liola and Kaiser wind up going to school together. Liola has been trying his best to live the life of an ordinary person, but after certain things happen one after the other, he begins to realize that being an ordinary person could be harder than being an assassin.

Sue Lin the protagonist gets teleported to the online gaming world she’s playing in, reverting back to 4 years old. Watch her cause mayhem in that world!