Unable to Survive Without Sex With an N.P.C. Demon After Reincarnation

"You should thank god that I'm your first." If he licks and sucks my clit and inside so much... My magic power will spill out! This demon... He's too good at sex even though he's just an N.P.C. character! Mia, who died from overworking, is reincarnated as the saintess heroine in a "bad-ending-riddle