s01e01 — Knowing

Shortly This anime still has 2 episodes from 2003 and 2005, and you don't have to watch them because almost nothing has changed in the series. Of course, I did not undertake to compare the stack frames, but purely from memory I can say that the first 3 episodes are the 1st one without changes with additional ones.by frames
By "unchanged" I mean that the drawing is dash to dash and color to color. Unless some lines are written differently.
In general, my point is that there is no point in watching Ovashki, feel free to start with the series.
And the animecha is generally not bad. I won't say that I would advise anyone to watch it, but if you have nowhere to spend time for the evening, then there are only 9 episodes, and they look pretty easy.