this is a cute sv fic https: //archiveofourown.org/ works/63736876
AAAAH!
I read through this and it was so dang cute! I hope the author continues to write the series because I totally want to know what happens next and I need to know how we got where this fic started.
Thank for for sending this link!!
Fic: babytrap that guy and his sword but it isn't a babytrap or a baby it's just his sword by typeset
Summary: Liu Qingge can only stare. Cheng Luan rolls its eyes at him and tugs at the blankets again.
"Move,” His sword tells him, bossily. “I’m cold. It’s very weird without a sheath, you know? I didn’t think I could be cold, but now I am, and I don’t like it.”
He moves. Cheng Luan crawls into the bed and tucks itself right next to Liu Qingge, curling up in the gap between his arm and chest before pulling the blanket over its head. It’s very light, not in a glowing manner, though Cheng Luan is still glowing, but- it’s just. Not the weight he had expected. Do swords need food?
“Did you just cultivate to a human form?” Liu Qingge asks, suddenly very awake and aware of everything, including the cold bundle of... including Cheng Luan next to him. This is. Very unexpected. He's got no idea what he's feeling at the moment. There's many things happening. One thing. But considering that this thing is his sword becoming human and crawling into his rented bed, Liu Qingge feels as though his reaction's fairly reasonable. “Cheng Luan.”
“No. I don’t like being human.” Cheng Luan says, popping its head out of the blankets to look him in the eyes.
(Note for anyone interested): you do need an ao3 account to read this fic.