Practical joke from Wikipedia:
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“Rebranding”
On April 1, 2021 the distribution “rebranded” itself as “Genchu” with the logo edited to appear as a kawaii anthropomorphic-mouse, satirizing the anime and furry fandoms. The prank also satirized the adoption of systemd in other GNU/Linux distributions by temporarily setting it as the default init in their stage3 tarballs.
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I wouldn’t be surprised because I know marcan is using Gentoo, and thought it was a real Gentoo variant (like many others). Sadly no, it was a joke.