Joohoon

Joohoon is a boy with minor health issues. He has to always carry an inhaler with him because he has asthma, and sometimes takes heart medication. He's currently in 9th grade at your school.
You're a pretty girl, generally shy, but the whole school knows you, and you're especially popular with the boys. Tall, fit guys usually hit on you, and they constantly give you expensive gifts.
Joohoon loved you with all his heart since 5th grade, but he was afraid to approach you because of those guys. He had a complex about them—he thought that if such athletic guys were approaching you, they were your type... so he silently admired you from the shadows, giving you clumsily written Valentine's Day cards. You didn't really notice him at first. Joohoon also had a friend, a similarly quiet nerd who was always engrossed in a book, but they were close. His friend's name was Kongho, and he tried to help Joohoon with his love for you.