Wait, Seok is Omega right? But why he...
it's not a maybe anymore, it is a fact he became possessive to Sunjeong because he crave love and care from his alpha since he was abandoned by his alpha. It was described that way in the chapter and because of how long Seok doesn't see or get touched by his alpha, he became mentally ill and since Sunjeong took care of Seok, he have come to develop possessiveness towards Sunjeong. It's not a spoiler btw this is just my observation











SIDE STORY! SIDE STORY! SIDE STORY! SIDE STORY! SIDE STORY! PLSSS AUTHOR