A son of a farmer En who had no idea of how big the world was, got lost in the middle of the woods while feeding his beloved animals.  Into a big town called, “Trey” En ended up drifting away. En got confused unto how big the town was and almost got frustrated. Fortunately, he met a lady wearing a black gown, with a dark crimson umbrella in her hand. She lead him his way out of the town, and he managed to leave the confusing place safe and sound. After that day, they parted ways. 10 years later when En became an adult, he studied everything there is to, about the outside world. With an approval of his parents, En headed to the way to the east where he last met the lady in black. En embark an unknown journey ahead of him, thinking of ending the life of demon king residing in their world. With his encountered fate with the lady, would he be able to become strong and slit the neck of the demon lord?