So Red's attitude is a wall she puts up to guard against her fear of being abandoned. Seems she's grown attached to Black-hair and doesn't want to get emotionally hurt. Hopefully no NTR with the brunette being introduced. I know how much manhwa authors love that shit.
Prediction: Mai was so let down by Asumi's reaction to their first kiss that she decided to join/find a brothel and improve her kissing skills (+ perks).
@GoggledAnon Thanks for the clarification. My mistake was thinking that the word-bubble was directed at Aria & co. in their room, and not someone else caught outside.
One of the breast chapters yet. Keep crow-girl safe! The "where are you guys going?" line seems to be a call-out from one of the staff; am I wrong to think "what are you guys doing?" reads more appropriately (FYI, don't know Japanese).