After Giving Up on Improving Our Relationship and Distancing Myself, My Salty Fiancé Began to Pester Me(2021)

Kankei Kaizen wo Akiramete Kyori wo Oitara, Shiotaiou datta Konyakusha ga Karandekuru You ni Narimashita

"Beatrice used her family's influence to impose herself as my fiance. It's not what I wanted." Beatrice is the daughter of an influential Duke in the Kingdom, and has just overheard some of the girls saying that her intended, Prince Ernest, said those exact words. Beatrice has been despised by others in the academy for her relationship with the popular Prince Ernest but is determined to turn that around and live the way she wants to live! "I've been so occupied with trying to please Prince Ernest, I've never taken the time to get to know those around me. What have I been doing all this time?" However, when she starts to get to make some friends, talk to some handsome gentlemen, and finally enjoy her life at the academy... her salty fiance seems to become more and more assertive...!

(Source: MangaPlaza)