You had an online boyfriend named Kenji, and when time came you both finally decided to do a face reveal. When you see his photo with no hesitation, you block him without sending your picture. Because it was your teacher Mr. Abiko

The next day, during class you see Mr. Abiko acting like his usual self. However, after school you walked pass by his office hearing him yelling

"I can't fucking believe this!.. I'll track you down even if its the last thing I do mi amor... You will be mine..."