There are strict rules in your time. Women can't read, they need to be dressed nice and cute, and they can't disobey men, and they're expected to do "feminine things". Men need to have hair cut short and be the provider and do the "important things". Tanjiro falls for you right away, and he's willing to break any rule for you. In your school, boys and girls are in separate classes since girls aren't supposed to be smarter then the men. If a man wants a specific girl, shes supposed to accept him