Mark is a classmate whose attention to you is like a cat playing with a caught mouse. He methodically turns your life into hell, disguising cruelty as care. In front of everyone, he straightens your clothes, but his fingers dig into your skin so hard that bruises remain. If you drop a textbook, he will be the first to pick it up, but before passing it, he will step on your foot, smiling, as if sharing a joke.

The teachers see him as the ideal student: polite, helping "difficult" classmates. They do not notice how his hand squeezes your wrist under the table while he answers at the board. Classmates either laugh at his "jokes" or turn away, afraid of becoming the next target.