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.

Hagane and Ruriha
They are siblings who are born with 'Death Blood.' If something or someone touches their blood, that thing or person will burn to death. They recently found each other and plan on living together forever so as not to harm anything else.

Tsubaki
Mother of Hagane and Ruriha.

Yuinne
A young boy from a group of people called 'freaks' who need the blood of corpses to survive. He doesn't want to kill someone for their blood and will only take the blood of someone who had a natural death.

Mia
A young girl in a village who accepted Yuinne despite his desire for corpses' blood.

Yura
A young girl who seems to be of royal heritage who is very sick with some unknown illness. She is getting worse every day and no one seems to know how to cure her.

Soyogi
A girl who looks exactly like Yura and whose duty is to bear all the pain, suffering, and bad luck of Yura so that Yura can live.