System Upgrade

Callie dies during a school shooting, while protecting her students’ lives. As a reward, the Goddess of Sacrifice allows Callie to choose a life she wants to reincarnate into. But, overwhelmed with guilt, Callie doesn’t want an easy life. Callie wants a chance to make a real difference in the world instead. She asks to take her student's punishment, which is to live on a world called Arion while cursed by the God of Cruelty. In this world, everyone has access to a system with unbelievable abilities, magic, and evolutions. However, many have used this power to subjugate and use those less fortunate. No one has ever chosen to reincarnate on Arion before...could this one girl change the fate of an entire hopeless world? And what's all this about a SECOND system upgrade?