Spoiler *
Yes he does lol
what how when? i need spoilers PLEASEEE
It doesn’t specify the exact moment he knew. He was just suspecting for a long time. He finally confirms it in chapter 36 (from the raws) when he sees jeongseos weasel form after he transforms in his sleep.
WHAT i love you
I mean at this point he has too
Bruh he has to know by now right? Right guys?