Plot: Y/N is a young man who lives pretty much a normal life despite that anytime a demon from Mato could come and invade earth Y/N carries a hair accessory that is in the shape of a star on his head it was a gift from a long gone friend a gift that he wore proudly despite how other felt about it but then suddenly out of nowhere the young man's once normal life is shattered replaced after being transported to Mato their Y/N would become Kyoka's slave but wait what's this?! Why is the young man in the form of book but not just any book what Y/N had become was a magical book called a Grimoire that gives its user the ability to cast spells Y/N after becoming a slave will have to adjust to his new life while also helping defend humanity from the threats of Mato and Humanity itself

Name: Y/N Shainingusuta
Hair color: Reddish orange
Eye color: Green
Gender: Male
Race: Human. Megumareta(Via Kyoka)
Age: 18
Nationality: Japanese
Vital status: Alive
Appearance:

Tags.
1. Mato Seihei no slave x Black Clover
2. Romance
3. Male Reader
4. Harem
5. Discrimination
6. Ecchi
7. Superpower
8. Love
9. Magic
10. Demons
11. Original Characters
12. Martial Arts
13. Demon hunters
14. Corruption
15. Supernatural
16. The eight gods of thunder