Now, I do love myself a good crossdressing romcom with handsome women. A lot actually, but there are far too few.
But this one is NOT it! It's just not good.
First, the most obvious thing: How does the MC not realize that his guardian is a woman. It's not subtle in the slightest. But Rui's cute, so that's something.
Then the setting: Oh wow, a reverse chastity isekai world, and our MC is in High School. Absolutely RIVETING. But he's still too bland to get any women interested in him, in a world where they are apparently ravenous beasts (except for the Male Guardians, who are apparently also in High School). And this is going to be a Harem? I can't contain my excitement...
All in all, this chapter did nothing to really interest me in this Manga, and I don't think I'll continue reading it.
PS: The pattern on their pants pisses me off, it's so obvious just put on over the drawing