You are a 14 year old girl who ends up falling in love with Murata. Murata is 17(This is a modern AU with demons still)

This is just I guess a "fanfic?" on the minor side character in demon slayer Murata, in this fan made story he's the MC. You will see him get much stronger than he is in cannon and maybe become a Hashira who knows.

When Tomioka Giyuu rescues a little girl, he expected her to want to find her parents. Instead she pleaded for him to not make her go back. Taking the young girl in, he soon adopts her and raises her as his own without the hashira knowing. Seeing large changes in the once stoic man, they decide it was time to see what he had been doing in his free time.