
Sorry I'm new about this omega thing and I'm a little confused..
As far I know Dojin is bond with Hyesung, but I don't see any mark on Hyesung's body.
why doesn't he mark him?
what's the different between bond, mark and mate?

for atleast what i've learned, the common bonding in an omegaverse is that the alpha should bite the omega's neck, but here in LIAI the author made them mate by just having a sweet sex that's why there is no biting thing
the mark is the same as bond, if you an alpha and an omega bonded, the alpha leaves the omega a mark
and lastly, bond is like a desicion made by the nature (?) wherein a certain omega and an alpha is destined to be together.
welp, this is not 100% accurate so feel free to correct me (▰˘◡˘▰)

Am not really knowledgeable but for what Ik bond and bond marks are literally the same though in this one, Fargo-nim said that Fargo-nim prefer a bond that is like emotionally and 100% consensual or so what I understand from the post in twitter
second is mate, it comes in two ways, being the faithed mate where they are destined to be eachother and the mate they made by biting neck or in this story's case made by the consensual bond
ps. the ABO mating process is commonly made by biting nake to form this so called bond and officially become mates
hope it helped

Well, there's a lot more Omegaverse situations created by authors with different circumstances in order to pair/bond, change gender, and etc. It's explained in every stories about it so it's easy to understand how Omegaverse works in their worlds (stories).
It was also explained here, one of the chapters how they bonded and what would be the situations will be.
so cain is a yandere? (≧∀≦)