A high school student named Reaper, having a habit to draw or paint the same image of a girl wearing a general uniform, suddenly transported, draw a sketch about their adventures, fell in love while traveling, returned to his world, and decided to go back to the another world that taught him the way to give life to his art.

The Illusionary King is about of a unexpected adventure of the main character of this story named Ethan that bring changes to his ordinary life while he repeating transported back and forth to his own world and the virtual world that turned out to be another world.