When Mu Mu vents his emotions on his blog as usual, he meets the acquaintance of a professor in the virtual world.
When the professor transports him into a virtual world through his subconscious mind, Mu Mu gets the chance to create 10 different new worlds as he wishes. Through his experiences in his new world, Mu Mu learns about the benefits of the all the things he thought were of no value or could not see the virtues of. Together with friends he made along the way, he learns while accomplishing given missions that he was tasked for returning to the original world that there is a lot more he does not understand.
The fantasy adventures of Mu Mu is the story of the journey that Mu Mu takes which allows him to grow into a more considerate, understanding kid, ready to face challenges given to him, through the loving support of his friends and family.
