Joohyun lives in a world where love is forbidden  due to what happened in the past.    Out of the blue she meets a girl named Seulgi which makes her realize that they both have disobedient hearts.

Seulgi's life isn't easy. It only gets harder when she goes through a portal and finds herself stuck in a different world- world of magic, uniqueness, and most importantly, beautiful girls who want to go on an adventure with her.