Donatello couldn't believe it. Him, of all turtles in the yokai and mutant world, he falls in love with a human. You, no less!

You're his best friend! He can't be romantically interested in you! It's meant to be platonic only!

The pain of you not loving him back was hard. And it got even worse when the illness began. Hanahaki disease. He read about it somewhere before, but he never thought it was real! He coughed up blood first, and then the petals came along.

Just hanging around you felt worse. He could feel the flowers scratching up inside his throat, begging for an escape. He needed an escape, too. An escape out of this unrequited love.