Leona living in the Planet called "Nexus"

In that Planet, man doesn't exist except for women. And all women can bear child using System Magic by fusing the two Women's Blood with their internal magic core.

Leona, she's the weakest girl in their village because she can use her ability properly, she has no family, her mother is still unknown and she's have no friends, she's all alone. She's always getting bullied for being weak but she continues living and her big dream is to become a Strong Hunter.

The Planet Nexus was full of Powers, threats, and enemies like, Demons, Special Demons, Demon gods and Demon Kings. And The Protectors the Village and Cities they called Hunters.

Hunters have their own ranks based on the Ranking Crystal if they touch it. 'F', that's Leona's level as now. 'E', 'D', 'C', 'B', 'A+', 'S', 'S+', 'SS', 'SSS', 'SSS+', 'EX', and 'Unreachable'. the 'EX' are strong enough to fight against Demon Gods.

The Professor's level are 'SS' and 'SSS' ranked, and the School Principal or Head Master level is 'SSS+', and the Hunters who reach the Level 'EX' are roaming around the world to fight the demons, to protect the world and search for more powers to get stronger, but some of them are roaming around the world for fun and find an opponent to fight.

Demons have their own ranking system starting with the Demons, their level is 'D', Elite Demons, their level is 'A+', High Demons, their level is 'S+', Special Demons who can communicate with others, their level is 'SSS', Demon gods, their level is 'EX', and lastly Demon Kings, their level is 'Unreachable' like Fiona, the strongest Hunter.

In the Planet Nexus there's a different Abilities and power you gain like, Fire, Ice, Water, Wind, Earth, lightning and more elements about Arcane Magic. But some of them don't have magic but it doesn't mean they're weak. Unlike Magic, more power exists like the powers of being swordsman's, Assassin's, Martial Art's and more. some of the 'EX' Hunters possessed by these Powers.

In the Nexus Planet, there are two types of Academies. First, Oral Academy. this is where you start learning about Magic ability and they will teach you how to use basic Abilities like, Fire, Ice, Water, Wind, Earth, and Speed, You will also receive your rank here as well by using Rank Crystal, your level Ability base in the Ranking start from 'F', 'E', 'D', 'C', 'B', 'A+', 'S', S+, 'SS', 'SSS', 'SSS+' 'EX' and 'Unreachable'. The Ranking Crystal what rank will give you depends how strong you are.

And the second Academy called, Hunter Academy, this is the Academy you'll learn more about Fighting, Survival skills and Demons. You will also be assigned to fight the Demons as well, level 'D' to 'EX' but it will be based on your ranks and what demon level you can handle.

Leona was the main protagonist in the story and the weakest girl in their village, Leona didn't know about the Two Ability Powers she possessed was so powerful called Infinity and Cosmic Shadow. She will find out about her power Ability after she reaches 'S+' rank and while she's fighting against the 'S+' High Demon, this scene will happen soon.

Hunters are under control by the Higher Ups.The higher Ups are just Normal Human who doesn't have Magical Power, but they're like politicians who control the world by rules. But some Hunters are not under them and not listening to them like Fiona, She's the Strongest Hunter and her Rank is 'Unreachable' enough to face one of the Demon Kings alone. In the Hunter Association, there are only Ten 'EX' Hunters and one 'Unreachable' Hunter.