I guess it's slightly more confusing if people try to imagine the events in manga chapters format.
So, the premise is a parody of the parody (which is the main manga), and this is never episode 1 of a single cour anime, somewhere around the middle like episode 6.
The events start with Aki meeting little Sakurako (Minute 16 in a 22 minute episode). The rest of the chapter plays out chronologically, but refers back to what happened in the episode prior.
In this sense, it's somewhat easier to picture the 3 manga chapter span the characters are referring to.
-Aki meeting little Hime (chapter 3)
-little Hime and Sakaki fight (chapter 2)
-little hime comes to visit (chapter 1)
Roughly like this. Fits splendidly into a single anime episode, covering 3 chapters of an 18page, not too wordy romcom manga.