Ugh. What does he mean revenge? With his skill, he can easily kill the princess, right?
I don't get this series. MC can easily archive what he want to do (right now), but he does not do, and then he regrets, and then he still does not do ? and even more retarded, he showed himself before the villain, she who has the most authority only after the king, instead of dealing with it secretly, then he returned after had a friendly talk ?