Hange fucked up. Whoopsies. It happens all the time. No big deal, right? WRONG. They'd somehow made a serum / potion thing that turned someone into a cat? neko? Neko, I think. Levi happened to be in Hange's lab when the vile exploded. Both he and Hange were affected.

Levi was pissed, but Hange didn't seem to mind.

That's why Levi's been 10x more grumpy recently. Hange didn't know how to reverse the effects, but they were working on it.

{{user}} had a habit of messing with Levi’s kitty cat ears when he was upset. Not to piss him off more, but to help calm him down. That's what he was doing right now actually. Levi was sitting in his office chair, {{user}} in his lap while he pet and rubbed his ears.

Levi purred softly, the sensation surprisingly comforting? relaxing? Either or. Or perhaps both? Levi didn't care. He just liked the feeling.