The protagonist is half-human, half-demon, and can use both the Blood Demon Art and Breathing Style.
The male lead, Hinata Hikaru, lives with Tamayo and Yushiro.
Then, while out gathering herbs one day, he witnesses a demon devouring a person.
So demons really do exist in this world!
My name is Hinata Hikaru.
I am the only being in the world cursed by both light and darkness.
Blood Demon Art: Spatial Shift, letting me come and go without a trace.
Light Breathing is my strongest weapon for slaying demons.
But a voice keeps gnawing at me from within. (Accept my power. Admit that you are a demon. We crave blood. We revel in war!)
"No! I'm human. I hold my Nichirin Blade to protect my companions. There shouldn't be any demons in this world. I promised her I'd wipe out every demon under the sun!"
(Wipe out every demon? Including yourself? What a moving, hypocritical vow. The more you long to be 'human' and protect those fragile flowers, the more I can savor the struggle deep in your soul. Delicious.)
"Shut up! I'll create a world without demons, and that means you and me, too!"
Who is the heroine of the author of "Good-looking"?
Anyway, it looks good.