Magistellus Bad Trip, Vol. 1 (light novel) — Kazuma Kamachi

PLAY YOUR CARDS RIGHT, AND YOU MIGHT JUST WIN A high school student with millions of in-game earnings, Kaname Suou is one of the strongest Dealers in Money (Game) Master, a virtual world where nothing is against the rules. Assisted by his succubus AI partner, Tselika, he seeks the Overtrick-a set of powerful cheat-level weapons that break the laws of physics-and one young girl. What does it take to save somebody in a VR city with gunfights, car chases, and high-stakes stock market gambling? What exactly is in the cards for Kaname and his associates?