【爆アド】生まれた直後から最強悪霊と脳内バトルしてたら魔力量が測定可能域を超えてました〜悪憑の子の謙虚な覇道〜

Five seconds after being born, he fought a mental battle against the most sinister evil spirit... and ended up with maxed-out magical power!? Kai Shiragami is reincarnated into a Japan where monsters known as "Reima" actually exist. However, the moment he is born, he finds himself in the middle of a ritual to summon a "supreme evil spirit." With his mother on the verge of being cursed to death and the spirit rampaging to take over his body, Kai fights a mental battle for control. By the time the battle concludes, Kai has unconsciously transformed into an unimaginably powerful being! The curtain rises on this invincible Japanese-style fantasy featuring the ultimate "Exorcist"!