Meng Xun, a half-human, half-angel, is deeply troubled.
His middle-school deskmate is Katsura Kotonoha, and his neighbors, the Hyodo couple, have a son named Hyodo Issei.
There's a cafe called Koten on his doorstep, where the young lady Erina Nakiri sometimes comes to sneak a peek and learn a thing or two.
Fortunately, his mother left him the Holy Grail of the Underworld, a Longinus Sacred Gear.
This is the story of a half-breed angel who wields the Holy Grail of the Underworld and rises to the top.
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.
