"Big Brother, I'm sorry..." Forced incest between a sister and her brother being bullied at school - a crazy classroom edition

My younger sister is a target for bullying at school and gets seriously bullied every day. The bullies get tired of normal bullying, so they call on their older brother, who is a bullied child, and they become targets them too! The older brother, who should be helping his sister, is shown to be sexually bullied, but he is scared and can't do anything. Furthermore, he was sexually bullied and had a painful full erection in front of his sister. A crazy world like hell, with no gods or Buddhas. The brother and sister who fell there are exposed and are toyed with. His pride as a falling older brother and his younger sister's self-esteem. The fierce bullying of cruel students who have crossed the line that should not be overcome as humans is beyond imagination!