>>281614258
Newest Volume 10 cover has been teased by the author which is Shinobu as expected which means Volume 11 will be Rikka

>First 4 volume batch order:
Rikka>Nene>Iko>Shinobu (Volume 1-4)
>Second volume batch order:
Nene>Iko>Shinobu>Rikka (Volume 5-8)
>Third Volume batch order:
Iko>Shinobu>Rikka>Nene (Volume 9-12)
(Currently on Volume 11)
>Fourth Volume batch order:
Shinobu>Rikka>Nene>Iko (Volume 13-16)
>final cover:
All 4 Girls together? (Volume 17)