Naruto: The Outsider's Resolve - Chapter 2.10 (041):

[No fixed CP + wear books + brain hole cool text + women disguised as men + group pet]

Gu Lan crossed over and became the cannon fodder of the original book disguised as a man, counterattacked the protagonist of the original book who slapped her face, and lived in a dormitory full of sickly beauties.

Until one day, she discovered that her roommates were villains from other horror novels. After discovering the secret, Gu Lan thought she would be killed, but her roommates all looked at her strangely… Contrasted with cute Zhengtai, sickly and beautiful boy, split personality school girl, cold and stern school bully, romantic and noble son who plays Shura every day field.

- Description from novelbuddy

To be is to have a soul. The soul begets a will. Wills accumulate into mysterious psychic forces, weaving secret domains within the fabric of reality.

“Kat, you have a tail” said Lily

“Look, Lily, it really isn’t that big of a concern” said Kat

“You.Have.A.TAIL KAT” said Lily “How is this not a concern to you?”

“Well, the dream I had was a bit weird as well, but if I’m honest, I’m mainly worried about the floating text that’s on fire” said Kat

“THE What?” said Lily

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Join Kat on her dimension hopping adventures as she fullfills her demonic duty and answers the call of the summoner. Each week Kat will get involved with new strange situations and oppurtunites that await her. During the week she'll have her best friend Lily, and perhaps a little help from Sylvie to figure out what's she supposed to do with her life now that she's becoming a demon.

This book is also known as ’Because I Spoiled My Wife Too Much, I Was Forced to Become an Invincible Antagonist.’ Gu Lan transcended into a fantasy novel as a supporting scholar. He even gained a beautiful and delicate wife. He had initially planned to live quietly, avoiding all kinds of trouble based on the original plot, and spending his life peacefully with his beloved wife. But he happened to acquire the ’Read and Copy Books System’! As long as he read and copied books, he could extract cultivation, becoming a saint and even a deity! Due to being overly invincible, Gu Lan casually crushed major antagonists when he ventured outside. Sons and daughters of fortune were eager to acknowledge him! As his strength skyrocketed, his career went surprisingly smoothly as well. One day, Gu Lan, the top scholar from the high school examination, entered the palace and saw a stunning empress behind the curtain, who looked very familiar! “Babe?” “Darling, don’t you not recognize me when I put on the dragon robe?” “...” From that day on, the whole world knew about this extraordinary couple. The original male protagonist: “He’s already a Heavenly Emperor, and I’m just at the third stage of martial power. How am I going to compete?”