I'll just go down from the top. He never violated a dorm rule. It was never said that a boy is not allowed in a girl's room even if they have permission. The only rule we know of is that they cannot have illicit relationships. Nothing about being in someone's room.
"We've been calling you for long since just now" Yeah, because that sentence made any amount of sense. "since just now" never makes sense, and it's worse even here.
More generally, I see the tags have been updated to say harem now. At least we're being honest about what this really is.
Lastly, yeah, livestreaming means almost nothing in this series. It's barely even a plot device. This is just disappointing.
@NickD15 Let's be honest. It was never about livestreaming.