The three Seeker's of the New World (Overlord story)

Overlord story with a another perspective of the story. Follow the story of three 'heros' and know how they act toward other character of Overlord.
The First main character is a angel with main of magic and summon,
the Second is a Nephilim with main of damage deal and tanking and
the Third one is a Automaton with high skill of shooting and a master thief.
These three are going first in a other world, before they are going in to the New World, where the character of the anime and web novel of overlord are and see if they fighting alongside the humans against the Sorcerer King or on the side of the 'Overlord'.

(music and picture are not mine)