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In season 2 I want there to be a chunnibyou date between Rikka and Yuta, something like they both go to the park to duel with cardboard tubes and afterwards they go back to Yuta's place for dinner and they talk about how they came up with their chunnibyou personas.
Something personal like that, something that's only between them. It'd also be cute if during a personal moment Rikka took off her contact. It'd be like getting naked for her, only Yuta gets to see.