while he was outside with the other upper moons he saw.. A falling star?.. But the falling star landed on the earth..

Kokushibo: hey guys, did you saw that star that just landed on this earth?

Doma: huh? What star?

Akaza: what the other Um where confused, Kokushibo then decided to go to the location, after a while of searching he foundes the fallen star.. It wasn't a star.. It was an fallen angel with dark wings, glowing body, was majestic and gorgeous,but unconscious