After dying on Earth, a young man called Grey fell into another world --- a world of floating islands and boundless skies called Earthtear. Nearly fell to death the moment he arrived, Grey was saved by a mysterious witch, Dandelion, who took an interest in him and made him her assistant. As the world gets shrouded in the threat of conspiracy, war and annihilation, Grey and Dandelion would seek the truth behind the world --- and their own pasts --- to find a new path towards a better tomorrow.