[Mahou]

About Yuuta lashing out at Dekomori: It was a harsh scene, but I can partly understand Yuuta. He was during the whole episode in doubt with the way he has handled the situation. And it looked like that when Dekomori started her speech that Yuuta was already "trembling" in holding is outburst back. Yet, Dekomori, who was understandably concerned about Rikka, couldn't read the mood either and (unintended?) kept pouring more oil in the fire until Yuuta snapped. When she was talking under tears, you could see that Yuuta's respone at one point was also on the verge of shedding tears. Yet, stuff like "Did your tricks ever work once in reality" was uhm ... not that appropriated, but once the stone is set into motion you cannot easily stop the upcoming chain reactions of the stone avalanche/rock slide. At that point Dekomori wasn't really able to talk back and it seemed like the beginning of "finishing her off" in that heated discussion.

Let's see Kumin's true power in the next episode. Seeing that she's a normal person (except her ability to sleep with her pillow in every location), maybe she can give Yuuta some "neutral" advice. Her only connection to chuunibyou is, after all, only the school club in contrast to Rikka, Sanae, Nibutani and Yuuta.