Card Master

When the New Era arrived, the holographic principle of black holes was proven.

Black holes on Earth became data interfaces through which humanity could access a two-dimensional world.

It seemed like a vast game sweeping across the universe.

Then, one day, Gu Shi was reborn.

Fate opened up a new path for him: becoming a card master.

Gu Shi: Sorry, you want to fight? Let me draw a deck first.

This is a level-up story, focused mainly on the protagonist's career, with very little romance. Maybe the side characters will have to make up for it all _(:з"∠)_.

It contains some fairly hard sci-fi, though the logic still isn't fully verifiable.

The card decks are inspired by Hearthstone, Yu-Gi-Oh!, and many others, with lots of original worldbuilding.