The sister-in-law online class incident refers to a boy of 18 years old who had an affair with his sister in online class, but forgot to turn off the camera after his death and jumped off the top floor.

It is reported that the boy who jumped off the building was a student at school, studying in a local No.1 middle school, and was a senior one at the time of the incident. It is said that he jumped off the building because he did a very humiliating and immoral thing, fell in love with his own sister, and even had sex. What's even more amazing is that in the online class, because he forgot to turn off the camera, all the pictures that were ambiguous with his sister were witnessed by all the teachers and students in the live broadcast room of the online class.