Watashi wo Koroshita Wanko-kei Kishi-sama ga, Yandere ni Job Change shite Kyou mo Inochi wo Neratte Kuru

Tiana's engagement was broken off by the prince of her own country, and she was sentenced to exile. However, the knight of a neighbouring country, who was an aide to that country's prince, suddenly proposed to her. Since he was her type, Tiana accepted the marriage proposal and traveled with him to his country, but what awaited her was an unjust death. However, although she should have died, Tiana finds herself back when her engagement was broken and she was proposed to by the knight!
"Now... Now it's too late... I'll have to kill her."
The last words the knight spoke before killing her lingered in her mind. But Tiana doesn't want to die again! Terrified, she tries to refuse the marriage proposal, but she can't e...