I still don't understand why the fuck would anyone let those three cretins stay over. WHY? WHAT COULD POSSIBLY BE THE REASON? It's not like they're harmless either, they literally tried to storm the bathroom where both of them were naked. This is NOT normal.
Those three characters alone lower my rating of this manga by at least 2 points out of then. Why? I'll tell you why. Because their ONLY purpose is sexual harassment. They're so one-dimensional and shallow, that I don't even remember their names. Were they even named? I don't think so. Imagine actually introducing three characters with the sole purpose of sexually harassing another character, and ramming them into the story at each and every possible occasion.