UPDATE:
Nevermind on all this. Turns out half this series is just a bunch of incredibly on-the-nose callbacks and cameos to Rikudou's previous works, and that weird Yugioh monster is no exception (and the other half is a surprisingly captivating story for what's nothing more than a yuri magical girl manga written by a dirty old man).
It's a shame this forum died before this series really took off, I would have loved to see what people thought about it. Personally, those first few volumes were excruciating in how saccharine and one-dimensional everything was (especially the protagonist), but it kinda started to grow on me once the story started having an actual plot around volume 5 or 6. It's so weird, but really fun in its own little way.