Grace of Letoile - The Quest for a Wish

This story goes by the hero in search of obtaining the 6 setzers to grant his wish to travel back in time and save his parents, along with his twin sister he finds a Letoile (Automatas which stores the setzers) and together they go all over world looking for the ones, but why things seems so mysterious, and why does the father of letoiles looks to be exactly in the right place and at the right time always providing a information for the party?