So this just got axed or promo, but still managed to adapt LN volume 1 to some degree, since until chapter 10 was already close to the end of the volume (until when the girl transform in ch10 was fine), they just rushed and skipped the fuck out of that last fight and went for epilogue lol
Though this wouldn't make me want to go read the other 2 LN Volumes, reading 1 of them was enough for me