Damn this chapter is brutal... Many innocent lives are dead and it is a teenage student to say the least. With how much blood splatter across the room, i can't think how many chidren died in this school. Just from the phone call and that last scene, the student were killed in a brutal way.
I hope from this point MC can learn to show a bit more compassion to save people instead just focusing on leveling up. Because all this time, even though he has the power to protect he only save them for last minute. I hope he can develop from this especially this time the sister is included.