I ordered DVD box 1st volume and received it today and surprise, surprise there wasn´t soundtrack CD in package.
From listed first time benefits (on amazon.co.jp, kadokawa site) - there were first 3 included, but not the 4th one.
【初回生産特典】
1.キャラクター原案・桑島黎音描き下ろしBOX
2.アニメ描き下ろしデジパック
3.原作・美紅書き下ろし小説収録 特製ブックレット
4.オリジナルサウンドトラックCD①
I just contacted amazon.co.jp about this situation.
Because when I contacted them before ordering DVD box they wrote me that the soundtrack CD included.
Will wait for their reply and probably we should put on hold this entry and also entry for second DVD/BLU-RAY box volume.
All the best
Porter