As per usual, I much prefer series where the FL is already in love so this gets a bunch of brownie points to start off with. She uses her knowledge to help out (making up for her utter lack of magic). Demon king is one of those awkward nice types that's used to everybody hating him. All around solid although it hasn't been long enough for much to happen.
Maou no Migiude ni Nattanode Gensaku Kaiaku Shimasu