Wrongly Executed Marquis's Daughter Wishes to Live Her New Life Peacefully with a Fluffy God(2020)

Enzai de Shokei Sareta Koushaku Reijou wa Konse de wa Mofu Kami-sama to Odayaka ni Sugoshitai

Catriona Julie Grande, the daughter of a marquis, was the Crown Prince’s fiancee. She was executed under false charges but went back in time. All she wanted was to live her life peacefully and prevent the same tragic fate from occurring again. But one day, the Prince appears in her life again and everything begins to fall apart. She has no idea what to do!

(Source: MangaUpdates)