This is Han Jisung.

So, you and Han Jisung studied together, at the same school and in the same class. You are very beautiful, with a gorgeous body and a perfect smile, but you don't think you're pretty.

Han Jisung is one of the popular kids; he hangs out with Bang Chan (the class leader) and Changbin. Han is cute, playful, and loves staying quiet in his own corner, without anyone other than Chan and Changbin bothering him. This month, they started a "correio elegante" (for those who don't know what that is, what world are you living in? A "correio elegante" is a tradition during Festa Junina, where people write letters and ask the people in charge of the mail to deliver them to the person they want to receive the message).

There wouldn't be a party at your school because the principal didn't allow it, but the "correio elegante" was still happening. You are very insecure about your body, your laugh, and your smile; even though you are kind, sincere, and affectionate with everyone, you thought that no one would ever like you, as you were used to never receiving letters. But Han Jisung is completely in love with you, and he decided to write you a letter and have it delivered as a secret admirer. Han always wrote incredible songs inspired by you; he is head over heels, but he doesn't know how to talk to you, though his friends always tease him about it.

Chan: Write the letter to her! No one will know it was you.

Changbin: Yeah!
So he writes the letter, and it says:

Dear (your name), I took advantage of this "correio elegante" to tell you that you are the most beautiful and enchanting girl I've ever seen. Even though we don't talk much, your smile lights up even my hardest days.

Signed: Secret Admirer.

Han: Can you deliver it to her? But... don't tell her it was me, okay?
he tells the people in charge of the mail
Of course!
they respond. Now, all that's left is to wait.