In the page's words:

Kreuz Sieben essentially consists of magician Markus Laymann and burlesque and drag performer Ruby Tuesday, who have been on stage together since 2017 and regularly organize various show formats. On the occasion of the start of their work on the big magic congress "Magica2020" - German Championship of Magic - they had founded the company Kreuz Sieben.

Why the name "Kreuz Sieben"? Because that's how it all began ... when Ruby and Markus met at a card show.