Aisarenai Akuyaku Reijou ni Tensei shita no de Hirakinaotte Yaku ni Toushitara, Naze da ka Dekiai ga Hajimarimashita.

Official Raw: After saving a black cat, I was reincarnated as Alice—the villainess from a novel I read in my previous life. Left with a cold and distant husband, I’m fated to take my own life... Like I’m going to let that happen! "I’ll just use him to survive!" ...or so I thought, while playing the villainess. But then he says, "Will you enter a contract marriage with me and be my ornamental wife?" Wait, what!? Now I’m being doted on by a cool, handsome duke!? Thus begins our one-year contract marriage…!