wtf is Cain hiding is my question

Spoiler
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That he was a dog in his past life and jooin was his master. That’s the only thing he is hiding

OML

and was Yahwi the cat

Ah well no they haven’t said anything about yahwi being a cat so far

Actually i guessed it when cain was sniffing jooin so hard n was curious about his unwanted feeling for his so called master like he was new to all this... (￣∇￣")