What's So Bad About Being the Spirit Behind a Card Player Who Loves Beautiful Girls?

Look, a transmigrator protagonist who was literally scared to death by a bunch of sinister card players! Come and see, everyone! I've also got all kinds of embarrassing stories about the protagonist! First come, first served! Don't miss out!, An advertisement from an unreliable goddess...

Under the goddess's arrangements, You Hun transmigrates to a world where card games are everything. He becomes the guardian spirit of a beautiful young card player in Duel Academy City.

You Hun: I get it, and I don't mind being a guardian spirit, but what's this about Duel Academy City?

You Hun: And this fifth-year class of only seven students? The setting feels way too familiar!

Goddess: It's purely a coincidence!