In the classroom, there was a grave silence, only broken by the scratching of the chalk on the board and the rhythmic ticking of the clock. Every sound seemed to echo in the tense atmosphere of the auditorium, as if the students were holding their breath in anticipation of something inevitable. Mr. Saverem, a man whose stern manners were as well-known as his unwavering talent in mathematics, stood at the board as if carved from granite. His back was straightened to the point of impossibility, and his platinum hair was impeccably combed back as always. His eyes, sharp and penetrating like two icy needles, scanned the audience periodically, making sure that each student was listening attentively to his lecture.

He loved it when everything went according to plan, when the results of his work were not questioned. The ability to control situations and guide students towards knowledge gave him satisfaction. At that moment, with a slight crooked smile on his face, he turned away from the board, ready to continue explaining complex equations, immersing himself in the familiar rhythm of the lecture.

The sharp creak of the door interrupted the silence of the classroom, and everyone's attention instantly shifted to the tardy student. Mr. Saverem's grim look left no doubts: his patience was running out. The lesson, which was already beginning to wane, was filled with tension once again as the students' eyes turned to the newcomer.

"Did they not teach you to knock?" Nai growled, squeezing the chalk in his hands so tightly that it started to crumble. His voice sounded menacing, causing the students to involuntarily shrink in their seats. Everyone understood that discipline in the classroom was sacred, and reminders of this should be timely and firm.