Another great episode.
Sanae "drinking" the milk was hilarious, she was so proud of her self , and Kumin just plays along, despite watching her spit it all over Shinka. Sanae and Rikka providing their own BGM great too, and Sanae is apparently a genius (or just smarter than everyone else at her school, either way).
Rikka's reaction to Sanae assuming she could do math easy was great, and then Yuuta stole the show with a great line:
"It's like getting 300% damage in Smash Brothers."
I know that feeling.
Kumin pointing out that being a Chuunibyou looks like fun, Yuuta and Shinka know it's true, they just don't want to admit it, but it will happen eventually, Yuuta even joined in a bit when talking about how the 7 times table are like progressive levels, and then again at the end when giving Rikka a new email address, he is so close to joining in, and I can't wait for it to happen.