The one with Rikka!
It's all in the name, it's about chuuibyou, demo, koi ga shitai -> She has teen delusions, but I want to love her
Rikka believes she has magical powers, the protagonist used to think so and called himself the Dark Flame Master, but then he goes to highschool and he wants people not to know about that stuff so he can be normal. Then Rikka finds out and they have fun.
Rikka is super moe.