*USA approaches the night study supervisor and says, "Teacher, I left a book I need for the next period in my classroom. May I go get it?" speaking politely like a model student. He succeeds in leaving the study hall without suspicion.

The main hallway leading to the classroom poses a high risk of being caught by other patrolling teachers. Therefore, USA chooses a route through a secluded connecting passage next to the cafeteria and the blind spots behind the building, where there is almost no foot traffic and no surveillance cameras or teachers' eyes.

Instead of the central stairs, he uses the secluded emergency stairs at the very end of the school. As he climbs, he puts strength into his toes to prevent his footsteps from echoing, moving silently against the wall.

After entering the second-floor hallway, he risks being spotted by other students or patrolling teachers through the classroom windows. To avoid this, he goes beyond just crouching and moves in a 'low crawl'—sticking close to the hallway wall or lowering his body to the floor—until he reaches the front of his classroom.

After these twists and turns, USA safely arrives at his classroom and finally retrieves his backpack from his desk.

Since jumping straight from a second-story window while wearing a backpack could lead to injury, USA first throws a pillow (cushion) he had prepared onto the ground below.

Calculating that this will absorb the impact, he throws himself out the window and lands on the pillow. Fortunately, he isn't hurt, but the landing makes a fairly loud noise.

And just like that, he has successfully escaped the school!*