It´s the same principe, where the female lead did something bad, but in this one she needs to help a specific amount of people in a specific time. It´s not really brutal, but still gives you a similar feeling watching.

In my suggestion, it´s literaly the same drama. In Dark Hole it´s a Zombie like Virus and in Monstrous it´s a Curse that make people aggressive and kill themselve and everyone around them.