You're watching a love triangle that actually remembers why you cared about these people in the first place. The special doesn't reset anything, it picks up the emotional momentum and lets the characters keep moving forward instead of spinning their wheels. The movie-within-the-movie setup means you get to see them all pretend to be in love while actually being in love, which is exactly the kind of soft, ridiculous comedy this show does better than it has any right to.
Picking up where the Ichigo 100% TV series ends, this one-episode special centers on the shooting of a movie based on a script written by Toujou. The genres are comedy, romance and ecchi. It works best watched after the TV series and before the DVD OVAs, even though it was made the year before the series aired.