Yamagata Tatsumi and his family were traveling in their car when a wild truck smashed into their car. But wait! The MC wasn’t dead yet, his entire family were though. With his entire family dead and relatives abandoning him, the only one remained by his side was his pet Cockatiel. For a year he lived only with his pet who was already with him since childhood. But finally her lifespan reached it’s end and she died in his arm.
After his pet died he lost his will to live and spent everyday meaninglessly. But since her death, every night he dreamt of a girl praying inside a room made of stone. 10 days passed and he was reminiscencing about the bird while playing his acoustic guitar of the song they used to sing together. Then suddenly the area around his bed began to shine and the scenery around him changed.
He was still on his bed but the room turned into the one from his dream, and the girl was there. The girl was teary eyed and then jumped upon and embraced him. The girl, Holy Maiden Calzedonia, smiled brightly and said “Finally… finally we meet again, master… I am your pet…. Chiiko!”