Flip Flap and Takyuu was the best of this season! :) Yes we're missing some big questions, maybe Cocona was abducted by the cult and brainwashed to believe that she was living with her grandmother, she had to be brainwashed because she didn't remember her playmate from childhood.
And the first thing they showed about Cocona's childhood in the real world was in the hospital, probably controlled by the cult too where she met Yayaka.
So... At one point they made it out of flipflap and ended in opposite sites without memories of each other... I guess we don't really need to know how they did it?
The twintails character was totally pointless lol! just a plot device for Yayaka to improve herself.... A friend told me that the director wanted a character with twintails... And that's all there's to it.
I really wanted a kiss but I'm glad we have yuri ending X) they hold hands!