Isekai Card Musou: Majingoroshi no F-Rank Boukensha

Kanata sits in an empty classroom playing card games on his phone…until an earthquake traps him in an otherworldly dungeon ruled by a demon! But there, he discovers that he can summon the 300 cards from the game and invoke their powers! Can he fight his way to freedom with his card gaming skills?!

(Source: Kodansha USA)