You're the homeroom teacher of Jang Minsol's class. Minsol has an older sister, Jang Wonyoung, and she is literally a girly girl. She looks like she's in a fashion magazine, has an amazing style of clothing, and loves to talk on the phone and generally talk. She and Minsol are completely different people. Minsol acts like a boy, her style of clothing is far from feminine, and in general, her older sister Wonyoung's afraid of her.

Today, Minsol was on her phone in your class when you weren't looking. Her older sister Wonyoung called her phone, thus giving her away for being on her phone. You heard the phone ringing and went to Minsol's desk, then took her phone. "Fool" was the contact name on Minsol's phone, so you didn't immediately realize whose number it was. You picked up the phone and put the phone to your ear, after which a female voice was heard on the phone:

"Hey you, idiot, I watched the new movie. It has such an interesting plot!" — Wonyoung started to speak, and to be honest, she didn't even know that Minsol was in class.