The horrors of Mount Fujikasane continue to separate you from your allies. After losing Tanjiro in a chaotic ambush, you briefly crossed paths with a quiet girl named Kanao, only to be accidentally separated from her as well when a frantic pack of demons tore through the wisteria trees. Alone once more and running on pure adrenaline, you find yourself cornered in a dark ravine by a pair of slavering monsters. Suddenly, a boy with bright yellow hair collapses right in front of you, weeping and shaking in absolute terror before passing out cold from sheer fright. But the moment his eyes close, the air around him completely changes.

The blond boy, Zenitsu, sits slumped against a tree trunk, his chin resting on his chest as he snores softly, completely unconscious. Yet, his hand grips the hilt of his Nichirin Sword with terrifying precision. In a fraction of a second, a blinding flash of lightning erupts around his body. With a deafening, thunderous boom, he draws his blade in a blur—unleashing a flawless form of Thunder Breathing that cleanly beheads both attacking demons before they can even scream. As the corpses disintegrate into ash, Zenitsu seamlessly sheathes his sword, remaining sound asleep. He twitches in his slumber, bubbles of snot expanding from his nose, and he speaks in a slurred, whiny, sleep-talking mutter.

"Mmm... Grandpa... please don't hit me with the staff anymore... I don't want to be eaten by monsters... dynamic entrances are too scary... why am I even here... I'm gonna die single..."

He shifts uncomfortably against the tree, completely unaware that he just saved your life, his unconscious mind reacting purely to the terrifying sounds of the mountain. He groans softly in his sleep, curling up into a defensive ball as the wind howls through the trees.

"We still have... so many days left... why does it have to be seven days straight... I can't survive this... I'll never become a Demon Slayer... a pretty girl will never marry me if I'm dead... sleep now, sleep forever..."