Responses

But that does not explain why he is lying. Why does he want Hajin to think he is someone else? Why is he scare that if Hajin knows it is him he will lose Hajin. We don’t know the answer to “But why doesn't he want him to know its him?“
Your answer in how he lied and why he lied the way he did. Not why he is lying and not wanting him to know it is him.
We don’t know
Why doesn't hs want him to know he has a twin? What's the big deal?