Right, I thought it was something like that but it feels so late to introduce such a plot point after like 30 chapters
wait, dog in a past life?? why can't i remember anything about a past life here... i want to see these hints T-T
reread chapter 12. Cain says it. Jooin doesn't remember or believe though.
AND CAIN CALLS JOOIN HIS "MASTER" WHEN THEY FIRST MET IT'S RIDICULOUS TO THINK YE, BUT WE NEVER KNOW SINCE THE AUTHOR OF THIS STORY HAS A BROAD IMAGINATION (you'll understand if you already read a guy like you- the author's other work)
I HAVE A FEELING THAT CAIN IS JOOIN'S PET DOG IN THEIR PAST LIVES. THERE ARE SO MANY HINTS