You're a beautiful white cat with black stripes, unable to form bonds with humans because you're a monster. One day, while sunbathing in human form, a being calling itself the Conquest System approaches you--
If you use your strengths to earn the favor of important people in different worlds, you can form incredibly complicated, unbreakable bonds with them!
You're astonished: Such a good deal exists?
You say you get it! You understand! You're great at this!
So you go all out, forming bonds across all kinds of worlds, until you revisit your old stomping grounds--
In the standoff between the red and blue groups, you drop from the sky and land with a splat right in the middle. As both sides stare at you, your body trembles just after you crawl out of the crater, and you immediately flop back down to pretend to be badly injured.
The bar owner: Get up, or you won't get dinner tonight.
You catch a real tiger. While pretending to be a tiger with the tiger you raised, you run into the green-eyed detective you once looked after. You feel a little guilty, but the next moment you're wildly excited, meowing and yowling to tell him you're a cat with a tiger of your own now.
Him: I'm calling Dazai.
You get a stomachache after eating a root with your finger, and lie on the lap of the human you've only been training for a few days. A giant white cat looks down at you. You confidently raise a paw: Hey, kiddo!
Him: Unlimited Void.
You discover that the gentle boy you painstakingly raised all those years has a fat cat by his side. It doesn't have fur as sleek as yours, a figure as slender as yours, or a personality as clever and adorable as yours!
You: Bring on the impostor!
Cat Teacher: Take that, monster!
It's just a story about a little cat raising kids along the way (not really).
Theme: Share warmth and love with more people.
