This OAV is a sequel to the TV series and forms a consistent
continuity to it (also to the movies). Some very good episodes (especially the
Ultraman parody). Some of the episodes are sequels to episodes in the TV
series but even if you haven't seen it you can still understand what is happening.
This OAV is a generally funny (Seven Days of Fire episode) with some serious
or touching (Snow Rondo). I enjoyed the entire OAV and recommend it to
an anime fan.