Ouzumou Reijou ~Seijo ni Hirateuchi wo Kuratta Shunkan Sumō Budatta Zense wo Omoidashita Akuyaku Reijō no Watashi wa sute Neko Ōji ni Chanko wo Furumaitai Haadosukoidosukoi~ (Novel)

When Floortje is reincarnated into the world of an otome game, things immediately go wrong. Her fiancé breaks off their engagement, and the supposed protagonist makes Floortje out to be the villainess. Little do they know, however, that Floortje was a sumo wrestler in her past life—and she won't let these weaklings stand in her way! With the spirit of sumo—her most trustworthy ally—to guide her, she's ready for a smackdown! But why was she reincarnated into an otome game, and how did its protagonist turn evil in the first place? (from J-Novel Club)