"Aisanai Unmei" datta Hazu na no ni ~ Tokimodoshi Kihi no Futatome no Kekkon

Christina married David, the young king of the powerful kingdom Romanova. But their marriage was cold; he was beautiful but silent, like an ice sculpture. Believing herself unloved due to her own inadequacies, Christina still loved him. When an assassin's blade threatened David, she shielded him with her own body and died. Yet she wakes up in the past, before their engagement. Granted a second life, Christina decides to live for her own happiness and avoids marrying David. But when they meet again, he is nothing like before—he pursues her with an intensity she never imagined. "I wanted to see you again." https://www.cmoa.jp/title/350410/