Not a fantasy | T.K

Taehyung finally turns 18 and now has the ability to travel wherever he wants. Jimin, his bestfriend, who has caught a liking to myths, threatened Taehyung that if he doesn't go with him, he'll leave him alone in Seoul. Together, they took the train, which is unusually located on an underground.

"Where the heck is this train going and why are we the only passengers-"

"Welcome to Joseon."