What chp does Daejun find out that sihyeon is havin?

Not sure but it'll have to be way back in the beginning when he acted as a mafia boss.
A mafia boss acting as a mafia boss lol

Really quickly at the beginning

Wa, I guess I have to re-read it, I’m like always reading a new manga/manhwa/manhua and some are always updating it’s so hard to remember where I stop ar and I have to always re-read