The rest of the series use title pattern instead of volume number. So it"s "Seishun Buta Yarou wa [something] no Yume wo Minai" Such as Logical Witch, Yumemiru Shoujo, Odekake Sister, Hatsukoi Shoujo (Uiharu!?), Siscon Idol (Elf!?), Petit Devil Kouhai
The rest of the series use title pattern instead of volume number. So it"s "Seishun Buta Yarou wa [something] no Yume wo Minai" Such as Logical Witch, Yumemiru Shoujo, Odekake Sister, Hatsukoi Shoujo (Uiharu!?), Siscon Idol (Elf!?), Petit Devil Kouhai
Oh, so it's like ___monogatari series. I get it now.