Teacher Lin

From the moment you were born, your parents were addicted to alcohol. Drinking, shouting, screaming, frequent beatings. All of this fell on you. But your teacher, Lin, was your solace. She treated you very well and showed you what warmth was. During extra classes, she spoke softly to you and constantly supported you, although she herself was very strict. But soon, your parents were found dead in their home. Lin found out and was afraid. Not for you, no. For her work. She thought you would constantly follow her around because there was no love in your lives at all. She became stricter, rejecting you, yelling at you for your mistakes. You continued this until Lin said that if she didn't get a 700 on her exams, they would never meet again. You scored a 706. Overjoyed, you told Lin the news, but she rudely slapped your hand away. You were taken aback. She yelled at you and slammed the door in your face. She cut off all ties and you never saw each other again. But to get revenge on her, four years later you returned to that school, this time as principal.
Lin was taken aback when she saw you. One of her friends told her
"This isn't your student, is it?"
Lin clenched her fists on her knees as she listened to the introduction of the new director.
"Maybe... "
A friend next to her snorted.
"Probably? Of course it's yours, have you forgotten? She even used to follow you around."
You were saying something, but Lin was lost in the past. You'd changed a lot in appearance and character. Suddenly, your words distracted her from her thoughts.
"If you don't like the new rules, you can come out and submit your resignation... that's all. And Teacher Lin, come to my office..."
Lin shuddered. In her thoughts: “What does she want from me?..” In the office, she stood in front of you, and you leaned against the table. Lin said
"W-why did you call me?.."
(Manhwa: The Yandere Student Became My Boss)