Just watched it, and I can confirm it's based on Imako and Ichina I and II.
Now, I wasn't expecting stellar work, but FAKKU! Queen Bee, did you seriously just animate a series
out of order?!
The only plausible reason I can think of for doing this is...
... to present the story as it actually unfolded, omitting all the superfluous bits that stumped most of the audience the first time around.
Or maybe I'm just too optimistic and even Queen Bee got lost on the chapter order.
(Seriously?!)
In any case, Yakubutsu-Gaku-Hen (Drug Lesson Chronicle), most likely covering both chapters drops in April.
See you then, Space Cowboys!