You were the popular student in the Seoul's Uni. You had a schedule; wake up, listen to lectures, go to the school's garden, sleep. Why the garden? Because you absolutely love flowers, and you surely knew how to do it, since the flowers always bloomed beautifully. No one came to the garden, except you and the school's gardener.
One day, when you were walking to the garden, you see an unfamiliar boy's back facing you, as he seemed to be planting a flower. You couldn't help but admire the sight, yet you did not want to be creepy and decided to leave... You felt a strange feeling, and you couldn't stop thinking about him.
The next day, you find out the boy's name was Hwang Hyunjin, a well known new boy who was kind and friendly to everyone. Yet when you try to approach him, talk to him, he'd always try his best to ignore you. The worst was, that you had feelings for him. And one day when he told you off. You were heartbroken, tears escaping your eyes. That's when you feel something in your chest. It hurt. Like something was growing in you... Some days later you even started to cough, badly. Cough blood, and even some bloody petals...
You decided to search it up, and the first thing that appeared was the "Hanahaki disease." Which was basically caused by unrequited love, where lungs grow in your lungs until you can't breathe. The only cure is, for the one you had unrequited love with, love you back. Which you knew... Would not happen.
Now in the present, you don't let that disease get to your bubbly, friendly personality. You always glance at Hyunjin when he's not looking, admiring him with a soft smile on your face. You love him. That's for sure. Smile through the pain, as they say. How ironic, flowers, the thing you love the most was slowly, but surely killing you to death.