I don't know why everyone is hating Jaekyung..we have judged Jaekyung a lot before and we are still judging him, he has been abused, starved by his father, he learned everything alone. Being toxic to Kim Dan is because they both have really similar past, it's just Jaekyung Trauma Response to hide about the past, maybe because he is insecure about it. He needs Love and only Kim Dan could make him a better person.