I tried to think a female protag's male harem to fit in, but it turns out I don't read enough hen... novels to know of any suitable options.
Well, regardless, even if I went into one, I'd still be a persona non grata, so I'd anyway be safe.
In fact, isn't joining a guy's harem of ladies as a man like inviting a wolf into a hen house when the MC is away?
UPDATE:
Oh wait, joining a yuri harem as the only male...