hmmm just in case
Angel route's available heroines : Mirai, Shanel, Arisa, Akari, Narumi, Madoka, Mehisha
Devil route's available heroines : Sayane, Akari
Human route's available heroines : Mirai, Shanel, Arisa, Akari, Narumi
As for the EX Dungeon, you need to synthesize 連環の門 in the material...