It hard to say anything about the chapter without spoiling it. I will say, after reading the this and the next two chapters I really like all but one of the characters.
Hmm... there is one thing I want to comment about that irritates me about manga sometimes. That is the obsession with status. I really don't like the way this chapter spends time talking about how prestigious and rich each character's parents are and then having characters brag about their riches. That's really tacky. I think we understand that these are a bunch of rich kids by including that in the description of the school in general. Why go through the additional trouble of establishing some pecking order amongst the characters? In what's shaping up to be a "Battle Royale" scenario, does it really matter? Ugh... The 1% is the 1%. Don't rub it in.
Okay, now on to the release!
Links to "Rex Fabula" Chapter 7: (Zip) (PDF)