What if Mu Han is actually the butler? The person claiming to be Mu Han is behaving suspiciously. If he’s a good guy, why would he try to kill her? What if the real "killer" is impersonating Mu Han and has framed the butler to look like the culprit, manipulating the situation?
This is a really good "what if", but if that's the case what about the relationship between mu han and miss? He did say "I will love you forever" and that panel looked genuine enough.
What if Mu Han is actually the butler? The person claiming to be Mu Han is behaving suspiciously. If he’s a good guy, why would he try to kill her? What if the real "killer" is impersonating Mu Han and has framed the butler to look like the culprit, manipulating the situation?