ugh... the typical "normal life" loser MC... if he wants sto stupid "normal life" then just retire as a assassin, get a ordinary dayjob, there you go, done, normal life aquired, and as a supposedly "assassin" he should already have that, because contrary to what most media seem to belive, assassins dont run around dressed like him and assassinate people 24/7, in fact, his choise of attire is utter garbage for a assassin, its almost as if he chose that stuff to intentionally stand out.
the reward he wants from the king is annonymity and money, and of course the so called "demon lord is a hot woman who essentialy becomes a submissive slave to him...