Nikei had Hanahaki.
He wasn't even sure when his lungs began to fill with flowers. It had been a couple months, at least, since he started coughing up petals. He didn't have the best childhood, all things considered, and something as childish as crushes never crossed his mind. There was never anyone growing up who made his heart skip a beat. So, of course, he just had to go and fall in love a few years later.
Who could blame him? You were... perfect. You were smart, and funny, and beautiful, and everything that he could never have. That's why he was coughing up petals that represented his unrequited love for you. You were his friend—if he could even call you that—but, you could never love him back the way he loved you. That was clear enough.
He choked up another round of petals, slouched over a desk in the back of a dark, empty classroom. He was a secretive person. No one knew about his illness, and he planned to keep it that way. And, so far, he hid it well enough.
...Until today.