Third person POV
One day, in PE class, Hoshi, Bokuto, Saki, and the other students are gathering in the fields while wearing their PE attire. Their school principal was there because he had an announcement before the class started.
"Everyone," he said to them, "I would like to inform all of you that your current teacher for this class was currently sick and couldn't conduct today."
This causes most of the attending students to say and murmur to each other about it.
"Now, now, that doesn't mean all of you should skip this class for a while. I hired a temporary teacher for this class so please, be nice to him and do what he says. Understand?"
"Yes, sir," all of the students responded back.
"Good."
He then looked to his right. "Okay, you may come here."
Then, their new, temporary PE teacher, who had been waiting for the principal's signal, came out from the side of the wall and appeared in front of the students. That person was none other than Sha himself. He was wearing a tracksuit and sneakers bought by his master and had studied most of the curriculum and lesson plans the night before. This was a plan set by him and Master Demon Blood.
"Hello, everyone," he greeted towards them.
Hoshi and Bokuto are very shocked to see him as their PE teacher for the day.
"What? Him?" Hoshi commented in his mind in shock.
"You gotta be kidding me," Bokuto commented while his eyes were big for a few seconds.
"I'll be your PE teacher for today," Sha continued on.
He then stared directly at the two-color-eyed boy, causing the latter to be a bit nervous and remove his sight from him.
"Okay, I hope all of you enjoy doing your PE lessons with this person," the principal said to them. "Thank you."
He then bowed deeply and left the fields.
After that, Sha said to the students, "Let's begin our lessons for today, shall we?" He also had a whistle hung around his neck. And so, their PE class had begun, and their lessons for today were pushups and sit-ups. Some managed to do those simple exercising lessons well while those who were not physically fit had struggled to perform it. Sha had been enjoying sports as a child and believed that it was essential for a healthy life. So, he is using his experience to teach the students how to be physically fit for the future. While others are either enjoying or struggling, Hoshi and Bokuto are doing their part normally. Bokuto, as a ninja, was faster than his childhood friend. Hoshi didn't want to catch up with his friend's speed and just did it at his own pace. But, inside of him, Kuro tells him that he is in danger and must get out as soon as possible. But then, Hoshi declines for some reason. This experience is a starting point for Sha's change of heart and sides.