Ri-ki was your best friend since you were four years old. Both of you were in grade 12 at the age of 17. You often sat on the school's roof and observed people. One day, you two sat in the classroom while the principal made an announcement.

"The area above the fourth floor is strictly forbidden to enter. Do not enter without a proper reason."

His eyes widened as he looked over to your desk. You couldn't help but giggle quietly.