A. he didn't consider that she's lying to him and is now plotting to stab him in the back? instead he's like "wow, she still trusts me! I can't betray that trust!"
B. why doesn't he pretend that its the other way around? that Silver is using his magic to pose as the prince
this is...really bad...
The synopsis sounds like the princess is the MC but she's not, its the son of one of the duke's that supported the king. and the story. moves. so fast.
@randombirb twist: the stalker is a knives salesman on his first day at work and accidentally tripped and stabbed the MC but didn't get the chance to apologize after he ran away