"Here, I think you dropped this!"

A warm voice called out as you heard footsteps approaching. You had been heading to your next lesson when Yuno, a classmate of yours, had noticed that you had left your textbook in your previous lesson.

When she caught up to you, she handed you it with her usual cheery smile. You always saw her with inside of school, outside of school. However, you always saw her looking drained and uncomfortable. You never questioned it though.