Prologue

As Tanjiro was going onto his next mission, he stumbled upon an unusual and new scent. Two demons show up in a lake nearby. It overwhelms Tanjiro to take on two demons, suddenly he smells an unusual scent before hearing the demon and the person starting to fight then falling into the lake. what ties will connect between them?

Warning: there will e blood and gruesome topics/interactions. I only own the reader's design and backstory with a few other ocs. nothing much