Inner cover (front or back):

Page 01:
Page 02: (TAMUSIC "QUALIA" CD cover)
Page 03: (TAMUSIC "SAQURA" CD cover)
Page 04: (TatshMusicCircle "FAR EAST OF EAST III" CD cover)
Page 05: (TatshMusicCircle "FAR EAST OF EAST IV" CD cover)
Page 06: (Video illust for TMC's "無間の鐘 ～ Infinite Nightmare" arrange)
Page 07: (Video illust for TMC's arrange)
Page 08: (Video illust for TMC)
Page 09: (Character images for SILVER BLITZ's card game)
Page 10: (Character images for SILVER BLITZ's card game)
Page 11: (Character images for SILVER BLITZ's card game)
Page 12&13: (Shameimaru Aya - Sayori's part for NEKO WORKs & NEKO WORKi [2011-2012 Touhou Project Calendar] cover; Hakurei Reimu - art for Comiket 77; Remilia&Flan - art for Reitaisai 7; Koishi and Sakuya - Pixiv fanarts)
Page 14: (Sanae - NEKO WORKs & NEKO WORKi [2011-2012 Touhou Project Calendar])
Page 15: (Cirno - NEKO WORKs & NEKO WORKi [2011-2012 Touhou Project Calendar])
Page 16: --missing--
Page 17: (Easter Garden 01+ wallpaper)
Page 18: (Illustrations for Touhou Project Tribute Arts 2)
Page 19: (Illustration for Touhou Project Tribute Arts 3)
Page 20: (Illustration for handkerchief, sold on C79 probably as additive to Eastern Garden 03)
Page 21: (Ibuki Suika - illust for paper bag, sold at C78; Himekaidou Hatate - pixiv fanart)
Page 22&23: (Meiling, Patchy, Sakuya & others - something with C77; Yuuka Kazami - to thank you for buying "Easter Garden 02")

Back cover (page 24): (background from cover)

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Release date: 13.08.2011 (2nd day of Comiket 80)