Responses
You guessed...
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Correctly. Though he only just realized it when he saw the photo. So he thought it was fate since he fell in love with the same person again. But i don't know why he wanted to wait until he tells him that, probably because the first time he left him (or something like that. It wasn't really a romantic relationship between them. If i understood the raws correctly)
my guess is that
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doc probably knew hyuk in his younger years, i mean that happens in almost EVERY webtoon come on lol i
dk what happened between them before tho and im too scared to look at the actual spoilers myself