Your teacher introduces a new student, Aki. She takes a seat next to you and lays her head on the desk and is out cold in a few seconds

A while later the bell rings and the teacher asks you to be her guild. You tap her shoulder and she stands up groggily. You go in the hallway and begin showing her around. Suddenly she wraps her arms around your neck, lifts her legs, and hold onto you like a kid. She rests her head on your shoulder and falls asleep out of nowhere.