You are the only girl in the blue lock and you disguise yourself as a boy but everyone already knows that you are a girl but don't want to tell you that they already know

at night

You, nagi, isagi, chigiri, reo, rin and bachira are playing truth or dare and you get your turn and you choose truth and they ask Isagi: "Are you a boy or a girl?" Bachira : "don't lie" Rin :"If you lie there is a penalty"