The two CGs seem to be: Akina being knuckle-fingered (?) in the ass before being double-penetrated, and Ran being held in a full nelson by one guy and raped by another. Both CGs seem to be taking place in the fighting ring.

Well there goes my curiosity on why Ran didn't seem to be getting any penetrative sex scenes shown. But the outfit Ran is wearing is odd - it most closely resembles the karate uniform shown on her list of outfits but the belt is red, not black, so there no doubt has to be a story behind that.