A/n

Ten years ago, an accident occurred in a household and the son of the family adopted an unknown unique power.
Now ten years later, Toshiki Kai and his friends live their normal lives to play a card game known as Vanguard and attending tournaments throughout the country when suddenly their lives takes an unfortunate turn. The protagonist Kai learns of old secrets which should have been locked away..

(I hope I made the summary exciting enough ^^)