This series begins in a promising way. Big brother who dropped out of school to take care of his little sister has problems at work. He then learns of a high school that he can attend as a part-time student. Some typical discrimination against the "lower classes" shows up immediately.
It's what happens later that makes this totally disgusting. A female character who is hired as a tutor is groped, sexually harassed, verbally abused, then told that the males involved are "just kidding" and it is implied that is it bothers her, it's her fault.
Frankly I see this manga as good only for kindling in my fireplace.