Just thought I'd start this up though it's months away. Despite his success with Today in Class 5-2, I honestly didn't think this author would get this series animated, much less as a TV series. This is honestly a hilarious story from what I remember of it though I haven't read much.
What I remember of the plot seems sort of like a 5-2 interpretation of Binbou Shimai Monogatari, with the addition of a third sister. The eldest, high-school sister is mature but maybe a bit laid back. The middle-schooler is on a permanent sugar high, and the extended effects seem to have involved brain damage. The elemetary-schooler is cynical, unemotional, and unnerving.
I only remember one scenario, but I hope it'll be near the start of the series:
Looking forward to this, it should be very funny. Given the author, expect lots and LOTS of pantsu.