A boy who died before he was born became a ghost out of regret for not having the chance to experience life.
He wanders the world alone, unable to interact with anyone. He exists for the sole purpose of fulfilling his wish.

One day he meets a mysterious person who will completely change his life, and together they embark on a journey of self-fulfillment. Will the little ghost be able to fulfill his wishes and depart for the afterlife? Where is their adventure going to lead them?