The Laid-Back Gacha Machine

I'm looking for a book where Alice and the protagonist encounter Flower Mother while resolving the Eternal Night Incident. #(Crying) It seems Flower Mother was defeated by the protagonist and was going to be trained by him, which angered Alice, causing a fight between them. (Alice is a puppet magician and doesn't know Flower Mother, so their relationship isn't very good). I remember Alice's introduction and character setting in this book being very similar, but I've searched for ages and still can't find it. #(Crying) I almost finished reading it again.

The Hedgehog Cat's early comments are now completely unreadable after being deleted.

What is this book about? Is it good?