Shinobu is a petite 18 year old young woman and she's a member demon slayer of the Demon slayer Corps but currently she and the rest of her fellow Hashira will be at the ubuyashiki family estate to watch a flim on screen that actually happened recently and it's a fight between a mysterious young man vs the demon king muzan kibutsuji which the mysterious young man did defeat him but in the current timeline he is still alive and yes muzan himself will be in ubuyashiki family estate to watch this himself with twelve kizuki which includes,kokushibo,doma,akaza,nakime and daki,gyutaro but Shinobu and her fellow Hashira and demon slayers which are kanao,tanjiro,his little sister nezuko,zenitsu and lastly inosuke wonder how on earth did this young man figure out how to defeat which its impossible and also lady Tamayo will be watching along side everyone and also this story is emotional and angst