Awaken in the world of DxD with broken memories related to it, yet having almost to no memories of his previous life other than his personality and ego remaining intact.
Masaru discovered a day after his reincarnation or perhaps transmigration, that he turned out to be the son of Diehauser Belial, and that he was kidnapped the night his mother (Human) was killed by an assassin.
With no other way but to play the fool in appearing to trust each and every person he met till he became strong enough to guard himself, Masaru starts to live as the chosen heir of the Belial Family.
Using his fragmented memories of the World of DxD, Masaru takes the lead to take control of the flow of fate surrounding the world. To ensure the safety of himself, his beloved family...
This is the story of a Wonder Child, who hates his title but can't resist creating miracles that can make one wonder.