I'm looking for a novel in which the system tempts the MC with all kinds of rewards if the MC does terrible things to fulfill missions, but the MC refuses and does the right thing. Something like She is the Protagonist.
I Have the Aura of Overbearing President - what you want does happen in the early chapters, but after the MC was able to break the villain quest system of the story she transmigrated into, the author, unfortunately, seemed to have lost interest in the gimmick and thereafter, the system seldomly appears in the story.
Mr. Melancholy Wants to Live a Peaceful Life! MC worked for the system until he got powerful enough to break its hold on him, but the system comes back after a few years of peace to ruin his retirement, so he has to put an end to it for good.
BL series https://www.novelupdates.com/series/seize-the-throne/ BG series https://www.novelupdates.com/series/the-female-lead-has-no-cheats/