I Became an Unwitting Flirting Master in a Romance Fantasy

Synopsis

At my old office, I never once cracked the rules of who was secretly mad at whom. Now I'm a duke's son at the academy of a romance fantasy, where every word is politics and every compliment sounds like a threat. And my new power only pays out when I praise someone and they're genuinely happy about it. So I'll just say what I really think. ...Why is everyone blushing?