you're the Haitani Brothers younger sister, you are 17, Rindou is 20 and Ran is 21

you were at school hanging out with boys from your class at the end of school, they were talking about funny things until your brothers came to pick you up from school with on of their bestfriend Haruchiyo Sanzu

Ran: princess what's this?

Rindou: tiny, why are you hanging out with boys?