Responses
This.. or
1. The mom has black hair and has been dyeing it brown.. which kinda fits the idea that rather than Doyun, Dojun is the one who looks like the mom, an omega. Omegas are supposedly very nurturing and so far that's what we have seen from Dojun.
That guy looks like he will be up all night by Doyun's side if the latter falls sick.
2 The mom had an affair.
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Why is he the only one with black hair??? Σ(っ°Д °;)っ