秘密ノ終ワリニ祝福ヲ (Himitsu no Owari ni Shukufuku o)

Background
The outcome of the secret was very tragic. This is the story of two girls and the box they were tricked into entering.This song is the final part of the Secret's Story. It is about the girls from Himitsu no Kingyo and the outcome of their secret. The lyrics are somewhat vague but it's implied that all the four girls became stitched together as one body against their will.

It was released on ALCATRAZ.