I imagine the original Manga had a similar set up as the last 2 panels.

Yep! In chapter 115, pages 3 and 4

What scars has that jerk left on our poor Rika?

I strongly suspect that there was a big argument where both Cory and Gordon warned her about Jayden. Possibly fisticuffs were involved. Rika was afraid and confused.

They left by car, as we saw. Rika found out just how big a douche Jayden was. She likely got abused or possibly even raped. Spandam is probably gonna cause some trauma on her later on.

She came to the rest of them all beat up or whatever, and since one of them did say something about studying for a bar exam, this probably means they figured out how to get a restraining order against him.