This kid looks like his bio dad,dark blue hair and eyes and MC has black hair and eyes but yes they do look alike. My hunch is according to the novel the boy's dad would have committed suicide,he gets childhood trauma he meets our black hair ml child who looks like his dad and is sunny and weak and therefore wanna protect him and so on. I don't even know if it was about love between an alpha and omega or just projection towards someone who looks like his dad and sees an image of his dad in.