Akuyaku Reijo Ni Tensei Shitanode Danzai End Made Gu Tara Sugoshitai Oji Ga Sparta Toka Kitenai Ndesukedo!? (Regina Books) [Light Novel]

[Machine Translation] Julius has regained her memories of her previous life by chance. She realizes that she is in an Otome game world and that she is a villainess. If she continues to follow the game's scenario, Julius will be beheaded by her fiance, the prince, for the attempted murder of the game heroine! She may be able to escape beheading if she manages to avoid the scenario, but she is too mediocre to do such a thing! She gives up early and begins to live a life of eating delicious food in order to live as she pleases, at least until she is beheaded. Then, perhaps impatient with her fiance, who is getting fatter and fatter, the prince starts to bother Julius a lot, trying to make him lose weight...!

ひょんなことから前世の記憶を取り戻したユリアス。それにより彼女は、ここが乙女ゲーム世界で、自分は悪役令嬢だと気が付く。このままゲームのシナリオ通りに進めば、ユリアスはゲームヒロイン殺害未遂の罪で、婚約者である王子に斬首刑にかけられてしまう!なんとかシナリオを回避すれば斬首を免れるのかもしれないけど、凡庸な自分にそんな真似は無理!早々に諦めた彼女は、せめて斬首刑になるまでは好きに生きようとひたすら美味しいものを食べる生活を送り始める。すると、どんどん太っていく婚約者に焦ったのか、王子がユリアスを痩せさせようと、やたらと構ってくるようになり―!?