The legend of the Train in the Clouds narrates that every 50 years an hero is chosen to get on it and travel to unknown places. His fate is unknown and the legendary Train still remains a mystery. Heiji Yamamura is the hero of this story: originally he was a 16 years old boy with a big passion for games and comics, but, once he sets on this new adventure, things will change drastically for him and for the people he'll meet. And maybe he'll find the girlfriend he's always desired to have?