This is a sort of recap episode. Most of the run time is just the 7th and 8th episodes of the series in nearly their entirety. It contains some flashbacks of episode 1. It contains a few small additional scenes sprinkled throughout with a new character that only appears here. It does not really add much to the story and can easily be skipped. A 12 episode OVA series with a recap episode that only really recaps 2 episodes seems very strange and there's a particular reason for that. The director of the first 6 episodes of the series, which wereall released across four dates in one year, died during production. A new director was brought in for the remaining episodes but from that point on production slowed and the last 6 episodes were released 2 per year for 3 years. The longest gaps in production were between episodes 6 and 7, and episodes 10 and 11, each being nearly full year gaps. This recap film was released during the second gap. Without the troubled production of this series, this film likely would not have been made.