Original (by ZUN):
幽霊客船の時空を越えた旅
Interdimensional Voyage of a Ghostly Passenger Ship
Undefined Fantastic Object Stage 4 Theme
Arrangement: NYO
Vocals: さゆり
Circle: Silver Forest
HP:
http://www.silver--forest.com/Album: 黄昏シューティングスター (Twilight Shooting Star)
Catalogue Number: SFNC-0021
Released at 博麗神社例大祭7. (Hakurei Jinja Reitaisai 7)