Mondaidarake no Mahoutsukai

Kyuichiro Tachibana loves puzzles! One day, while dreaming of going to a high school with a Quiz Club and enjoying a fun puzzle-solving life with friends, he finds a button for a game. Apparently, this button belonged to his grandfather, who loved puzzles, too. With the button in hand, before he knows it, he is lured into a world that is neither dream nor reality. There, he solves puzzles, earns points, and uses magic! A game of survival unfolds in this strange and mysterious alternate world! What will be Kyuichiro's fate?

(Source: Sunday Webry, translated)