Hane Glass no Kimi.

Summary

This Gothic shojo manga is a single volume comprising three stories-a main one, "One with the Glass Wings," and two shorter stories "Firefly" and "Jion Princess"-that feature characters falling in and out of love, against all odds. There is a fragility to the main characters in each story; each is afflicted with some sort of physical and/or mental ailment-for instance, a blood disease is the affliction in the main story. But regardless of all the obstacles and interference, love conquers all. (Source: Tokyopop)