[L/N] [F/N], the successor of the destructive pillar, follows in her fathers footsteps to become a Hashira just like him. But along her journey, she meets new individuals where new relationships begin to grow. Follow along on [L/N] [F/N] journey where formidable demons walk against her path, where she creates new friendships, and possibly something more. RANKED #1 IN KNY! - 1/9/2020

She didn't know what happened. She wasn't a demon slayer or a helper. She only remembered she was brought in by them. Even though she knew one of them was a demon. But she stayed because of them. And now she unexpectedly became the sun in their lives.

This started as a small idea. Just a bit of a "what if..." but since I love Kimetsu no Yaiba too much, it spiralled out of control and well... I have a lot planned, but I'll take it one at a time. So! This is a Reader x Rengoku au story. Of course, there's scenes with other characters and a whole plot I kinda have planned out but Rengoku is a bab so I'll try to focus mostly on him. The au affects him too so- Ahem! Anyways, it'll start a bit slow and I don't have a set update schedule so I hope you'll bear with me. Hope you enjoy the story! Disclaimer! Kimetsu no Yaiba and all it's characters belongs to Gotouge Koyoharu, the only thing I own is this plot and the Breath of Sparks. Warnings/Triggers : MANGA SPOILERS, violence, blood, death, language(mostly cuz Sanemi), angst, dismembered demon parts(?), idek what to put in this, crippling diabetes (I hope), and Rengoku's overwhelming fabulousness.