@byunjaes which attitude? I don't know if we are reading the same manhwa but it's like the uke is forcing is love on him. The top always says he sees him like his younger brother and mistake happened. Yet the top offer to take him to hospital after saying he got a vasectomy. He's shocked himself.
From what I see, the top is emotional detached, he has low emotions understanding but he's responsible. Maybe he's mimicking emotions like others. We can't say now Untill we get his pov