Great art and awesome sex scenes, though Azusa's was the most entertaining and interesting. But both Azusa's and MioxRitsu's scenes had a unique look to it, and still kept it sexy despite the roughness going on. 10/10 in my opinion.
I'm a little unclear in Azusa's part whether she's thinking of Yui because Mio and Ritsu are together, or if she's thinking of all three of them. Japanese's lack of plurals can be troublesome, sometimes.