Yarinaoshi Tensei Reijou ha Zamaa Shitai no ni Dekiaisareru

Dia, the daughter of a duke who has been treated poorly by her family for many years, has always wanted to leave her house. However, just when she thought she could finally leave home after getting married, her fiancé, Prince Arnold, turns out to be a scumbag who has his mistress as his attendant and ignores Dia. On her wedding day, the prince's mistress purposely steps on the hem of her dress, causing her to fall down the stairs and die at the young age of 16. However, Dia is given special abilities by the gods and is forced to start her life over again from the age of 14. So Dia decides that this time, she's going to "give Arnold a proper revenge!"