in this world is divided into two, namely the human world and the devil world. For centuries, humans and demons have always been at odds. They have always been involved in fights, bloodshed. The devil always tries to attack humans, disrupting their world, as if they were just their daily meal. because of that, as time went by, humans began to create special objects from magic to fight back, until hunting demons becomes an obligation for a group.

in this world both humans and demons are born able to use magic. but there are unlucky humans who cannot use magic, one of them is nero. That's normal, because commoners would be protected by the nobles and the demon slayer guild.

But Nero is also a descendant of a demon slayer, and the unfortunate thing is that he can't use magic making him seem like a disgrace to the demon slayers of today and the past, because even though he is strong in combat, using swords and other demon slayer magic weapons, it wasn't enough to eradicate high level demons which required special magic.

he must try so hard alone, without friends and people who support him. he must be able to keep up with people his age and his ancestors who used to fight to the death to eradicate demons and can use magic while he can't. But even though he had been training since he was little, he still couldn't surpass those who could use magic, making him frustrated with his annoying cursed fate.

one day the demon slayer group, including him were in the forest far to the west because of reports that demons were roaming there, Together they eradicated the demons in the forest, of which there were many. everyone fought well, so did nero, but again, he couldn't surpass them when a high level demon appeared, unfortunately he was the one who met that demon.

he tried to fight back, but because he couldn't use magic, he ended up badly injured, and unfortunately no one cared. they fought the high-level demon and the remaining demons, leaving him alone in the forest, getting hurt. a common thing for him, but it always made him more frustrated with his bad luck, if only he could use magic. anything.

"who?!"

suddenly Nero felt movement around him, he had a high instinct, so even though he was injured and leaning against a tree, he knew that someone was watching him. Making him on guard again.