In the end, I'm still all alone...
Mitsurugi Sayaka spent her whole life slaying and killing demons. Then she discovered that she had become a demon herself, a puppet with a sword, following orders in the name of justice...
Everything she wanted to protect had turned out to be an illusion. So, when it was all over, Sayaka chose to sleep forever. When she awoke again, she found herself in another world. The "ancient relics" she once knew had taken on a different form. But they were all man-eaters, so there was no harm in cutting them down.
A walking corpse, she returned to the endless routine of slaying demons and killing demons, waiting for the day she would meet her final end...
It's just that after every battle, the people who call themselves the "Demon Slayer Corps" and keep shouting that they want to kill her are really annoying...
Sayaka is the heroine of Blood-C. You don't need to have seen it to enjoy this story.
The heroine is the oldest of all beings, essentially a god. She's somewhat like Muzan and can turn anyone who touches her blood into an "ancient being." Her eyes turn red in battle, and at that time she can exert a bloodline suppression over demons much like Muzan's, so she's often misunderstood.
The CP will probably be one of Sabito, Yoriichi, or the eldest brother. I think only someone as gentle as the sun could save a heroine who's so lonely she's nearly dying of it.
Theme: Saving each other.
