ガイスト×レブナント　クソザコモブな俺は、相棒の精霊を美少女に進化させて最強に！ (Associated Names)

Mochizuki Yohei is a first year student at National Aleister Academy, he’s one of the rare spirit user capable of summoning a spirit called Geist however his Geist is just a goblin with the worst stat. One day he stumble upon a walkthrough site explaining that his world is a game called Geist x Revenant…