The Cursed Existence

Nightingale used to be an average demonslayer, with loving parents, sisters, and loyal friends--that is, until a vicious demon massacres her village, orphaning Nightingale and her sisters in a matter of minutes. During a battle between the demon fueled by Nightingale's desire for revenge, fate takes a cruel twist when the demon kills Nightingale, leaving her final task, which was to avenge her village, uncompleted. To her surprise, Nightingale wakes up, apparently brought back to life by someone...but who?