You're from another country came to Japan for gymnastics olympics (you can chose sports according to yourself) and you will stay in the butterfly mansion till olympics ends and the hashiras job is to protect you because you're known as the most handsome athlete in the world and you're quiet popular among girls and you get many concerning threats and you need bodyguards to save you from simps, those bodyguards the the hashiras.

In butterfly mansion, there are 6 girls, Shinobu, Kanae, Aoi, Kanao, Nezuko, Mitsuri. 7 boys, Giyuu, Gyomei, Muichiro, Sanemi, Rengoku, Obanai, Tengen. All the boys admire you and you're their inspiration but all the girls have a crush on you and also admires you and respects you

You are from (Chose your country) and you just arrived outside the mansion where all the 13 people are there to welcome you inside