
SPOILERS
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Mostly my theory that Dohyeok (older brother) was abusive to Suha in the past and was Suha's ex-boyfriend. That was pretty much confirmed. Other stuff that I'm theorizing (but not confirmed) is that Director Park and the brother have a terrible relationship, with Director Park being jealous of him. My other theory is that Dohyeok told Suha he wasn't good for anything but his body, which is why Suha straight out can't date anyone, or has no interest in anything but sex 10+ years later. Not sure what event was the breaking point that made Suha cut contact with Dohyeok, but it might have to do with that.
Is out! Yay!