Don't Mess with the Doting Wife Maniac

An ex-boyfriend lost his memory and married her sister. Is there anything more outrageous? Have! At the engagement party, he failed to get married, but instead he was dragged away by a man as dignified as an emperor! "From now on, Lu Man, I'll protect you!" Just nine words, very loud. She was immediately confused, "This, do we... Know each other?"