A high school sophomore punched a junior, stripped him off and even filmed the incident... ”We were sparring” = Korea

Police are investigating a complaint filed against a male high school student in Seongnam, Gyeonggi Province, alleging that he summoned a male student from another high school, assaulted him, and then stripped him and filmed him.
According to the police on the 30th, the incident took place on the afternoon of the 27th on the rooftop of a building in Seongnam.
A, a male high school sophomore, called another male high school senior, B, to the rooftop and indiscriminately assaulted him in the face and other areas. A asked B to take off his clothes.
It was understood that the man forced her to kneel down and verbally abused her. The CCTV footage released by SBS shows A straddling B's body, who had fallen to the ground, grabbing her hair and groping her face.
The footage clearly showed B kneeling in front of A wearing only underwear in response to A's threat to take off his clothes, and other students filming the scene.
In response to B's cry of "Please don't hit me anymore," A replied, "Why should I stop?" and made B repeat "I'm sorry" five times.
If you do this, I will go to your school and beat you to death." This bullying continued for about 20 minutes, and B ended up suffering facial injuries, including a broken nose, and was hospitalized for treatment.
A said that he acted this way because B had said bad things about him on social media. When B informed the school about the assault, A said that he had not assaulted him unilaterally and that he had not "attacked him."
"The police are investigating the incident, including analyzing CCTV footage from the scene.