Saikyou Shoukanshi wa Around 30 Ossan: Card wo Oya ni Shobun sareta Card Gamer no Isekai Musou

Sosaku Kamifuda was so absorbed in card games that he hit age 30 before he knew it.

While his former classmates were busy building careers and raising families, Sosaku was still living at his parents' house, devoting his life to his hobby. Finally running out of patience with his lifestyle, his parents did the unthinkable: they threw away his entire card collection without telling him.

Devastated by the shock, Sosaku is suddenly transported to another world...!

However, the handful of cards he still had in his pocket absorb the magic of this new realm, granting him the power of "Summoning"!