(Multiple heroines + no System + original story + main plot + based on the official guidebook)
Today was a fine day to go out. As he strolled through the bustling streets of Asakusa, Muzan took one look at the young man walking toward him and recognized him as a Demon Slayer.
He was even a somewhat powerful Hashira. But so what? He was just an ant with slightly more muscle.
Unexpectedly, the young man seemed to recognize him. But so what? This weak nobody could be killed with a single blow.
(The young man seemed to shine with the light of the sun, unleashing a thousand cuts in a second as if Yoriichi himself had possessed him.)
Wait, the light of the sun?!
No, hold on, the thousand cuts per second are the real shocker!!!!
By a stroke of luck, Xinyun picked up a Nichirin Blade and a diary containing notes on the Breathing Style. At first, he had a simple plan:
Meet Shinobu Kocho and tease Nezuko.
But after becoming a Demon Slayer, he saved people and slew demons all along the way. When I looked back, I’d become the Demon Slayer Corps’ strongest big brother?
Okay, the rhythm is a bit off, but it's still acceptable. Who is the heroine of this book? @