Talk:Kagamine Rin & Len/Notable songs list/@comment-68.44.172.48-20130221003707

so i don't know if anyone can help me with this, but i'm looking for a song.

i know it's about len and rin, but i think only rin sings it. it's basically about a girl and a boy who go on an adventure to find (or they already have it, i don't know) a magic stone and kill/slay a dragon. at the end i think the boy sacrifices himself using to stone to slay the dragon and keep the girl safe. can anyone tell me what it's called? i also forget the composers name. .-.