Watashi ga Akuyaku Koushaku wo Tasukeru Riyuu

A woman named Belona Rosentine has repeatedly died and been reborn over twenty lives, regardless of her choices. To escape this cycle, she chooses to assist the dark mage "Demonic," the original villain, in seeking redemption—something she never did in past lives. She hoped this might alter his destructive path, but instead, both Demonic and others take an interest in her. In this life, she unexpectedly falls in love with Demonic. Though she discovers the "hourglass" that could end her reincarnation, her situation becomes increasingly difficult to manage.