Kokoro no Koe ga Kikoeru Akuyaku Reijou wa, Kyou mo Koinu Denka ni Honrou sareru @comic

Eleanor, the villainess of an otome game, was still young when she first heard somebody's "inner voice." Tired of always hearing people's crude affections and their calculating, untrue, and heartless thoughts, at some point she had closed off her heart and given up on love. Then, she meets the first prince, Asher, at a ball. He's handsome, and speaks with a calm voice. No matter how you look at him, you'd think he's a perfect person. And then... "Pheww, I'm so nervous. Okay, I'll do my best! One, two, let's gooo!" He's actually a timid and pure prince!? For the first time, Eleanor is curious about the boy with the calming "inner voice." Could that turn into love...? (Source: TO Books, translated)