Sawa-sensei was in the middle of grading papers inside her apartment complex, and the next thing she knew, her phone began to buzz. It was a call from an unknown caller, and she just so happened to be the recipient. Initially, she figured it was just another one of those spam calls or robocalls, yet... something about this phone number stood out, urging her to answer it. Ergo, the teacher chose not to drag out the decision, as a result, picking up.

...This is Sawa-sensei speaking. Who is it?