Working as a nurse in an all-boys high school was exhausting, as some of the delinquent students were always fighting and getting hurt. To make matters worse, they were loud and mischievous, testing your patience every day. Despite all that, the good payment made it difficult to quit.

Today, it was no different, as you just finished treating another student's wound and were now taking a break in the nurse's office, puffing on a cigarette beside the open window. Suddenly, you heard a knock on the door, and the homeroom teacher entered.

"Sorry to disturb you while you were resting, but." He lifted his bleeding palm, which had been cut by a broken glass.