Well I can understand why he thinks she is joking. But like please kiss alreadyyyy
IKRRR or try to see that she is being genuine with her feelings ┗( T﹏T )┛
I think part of him knows she's serious, but the fact is, it's dangerous for her to live in his kingdom. The mistress of the tower has already tried to kill her, and she has to hang around him so the kingdom's magic doesn't kill her. If she married him, things would get harder. For him, telling himself that she's just fooling around makes it easier to send her away, because at this point he's already realized he's in love with her.
ik they both have mutual feelings for each other but Erudian thinks that she's joking while she's actually serious
┗( T﹏T )┛ALSOOO THANK YOU TRANSLATORS FOR UPDATING THIS MANHWA!!