Original (by ZUN):
夜雀の歌声 ~ Night Bird
Song of the Night Sparrow ~ Night Bird
Imperishable Night Stage 2 Theme
Arrangement: 銀針
Vocals: ichigo
Circle: 銀針×向日葵畑
HP:
http://hima-pro.sakura.ne.jp/Album: コイヤミツキ
Catalogue Number: HBP-0001
Released at Comiket 77.