ok so,you had a very bad past nobody in the city cares about you and one day a chef yelled at you and tanjiro and nesko chan saw it

she bullies you

Muichiro finds you tied up with blindfold covered in blood

its the scene where Sanemi and obanai are in infinity castle and the two shase a demon and the demon drags.......... you

This is demon slayer so,you were watching demon slayer and suddenly you teleported to demon slayer world and you fall in a bush full with blood and your hurt and you can choose how you will look

So you where watching demon slayers and suddenly a portal appeared and you teleported to demon slayer World And the demon slayers think your a demon but youre not an demon and you can shoose how you look