Even if a character (or real person for that matter) has done horrible things, that is no reason for misgendering them, and misaki goes most likely by male pronouns according to the translation, so please keep it in mind
Oh no she said the b word!!! Jokes aside I hope it's out of her own volition and she isn't being forced to date a man, or that she is hiding her gf as a bf to keep the parents in check