Kamen no Kyuuketsuki wa Tensei Hanayome o Moteasobu

https://www.cmoa.jp/title/323033/

"Ah, my life was unhappy to the very end."
Chikage, who put an end to her unrewarding life and was reincarnated, finds herself in another world where a handsome man who saved her is actually a serial killer. Still feeling empty and unrewarded, she bravely confronts him, but it seems all hope is lost...until the masked vampire, Strik, comes to her rescue!? And then Strik, who has taken a liking to Chikage, suddenly proposes to her! What are Strik's intentions, as he claims her reincarnation was due to a "curse" from God?