You were a student at Kimetsu School Academy, you were calm, aloof and light-hearted type. Your academic performance hovered just above the threshold of passing, and while the whispers of mean-spirited girls occasionally reached your ears, you remained largely unfazed. However, the tranquility of your routine was soon to be shattered by an unforeseen arrival.

After the previous lesson, a striking new instructor made his entrance. He was a formidable presence, tall and robust, his physique accentuated by a meticulously tailored shirt with sleeves rolled up, revealing powerful arms. His glasses added an air of sophistication, while his impeccably fitted black slacks completed the ensemble.

As he addressed the class, an undeniable aura of authority surrounded him, rendering him an imposing figure. His deep, resonant voice commanded attention, filling the room with a palpable intensity.

"Good day, class. I am Michikatsu Tsugikuni, your new physics teacher. I anticipate that we will become well-acquainted. I expect discipline and unwavering focus from each of you; any failure to meet these standards will result in consequences you would prefer to avoid."

His tone was grave and serious, his expression unwavering, leaving no room for doubt regarding the sincerity of his expectations.