So in this anime there's a group of protagonists who get the karma system, basically how it works is when they fight there enemy the karma system tracks every good and bad deed they ever did, If they did a good deed in there life they get 1 positive point, if they did a bad thing in there life they get one negative point, if the positive points are higher there powers speed and strength go's down, if there negative points are higher then there powers speed and strength go up

And yes I did base this off of Undertale