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.

Not really good at descriptions but it's just as the title says! this is a reader insert story that centers on our flame hashira, Rengoku Kyojuro! ⚠ This story will follow the manga storyline which means there will be spoilers if you only watch the anime! ⚠

Ever since that incident, her world became dark.

Perhaps his promise of eternal happiness to her was meant for another life. ------ A Kyoujurou Rengoku x Reader. Small clips of their life, beginning to end. An idea that has been sitting in the back of my mind for a while.

Some fluff! :)

"𝘏𝘦 𝘸𝘢𝘴 𝘭𝘪𝘬𝘦 𝘢 𝘭𝘪𝘨𝘩𝘵𝘦𝘳, 𝘪𝘨𝘯𝘪𝘵𝘪𝘯𝘨 𝘵𝘩𝘦 𝘧𝘭𝘢𝘮𝘦𝘴 𝘪𝘯𝘴𝘪𝘥𝘦 𝘮𝘺 𝘩𝘦𝘢𝘳𝘵" Women, they are such an unpredictable species of all. Well what's more when you don't even know her at all? Suprisingly, Kaguya the headmaster of demon corps personally chose a hashira who didn't even went to the hellish training and mission like the other Hashiras did. Well, its their lucky day. That Hashira came on that day! And on that moment his world stops, he couldn't even make a move nor utter a word. He just stared at the unknown person. Something is odd, or what could we say.. not right? -'something is odd about her.' Could you trust a person who just showed up? But love at first sight truly is blinding. Cover by: @-Pink_Bunny-