The continuation of the funny story about Ike was not a continuation, but a restart. In an attempt to rethink the story (although there is nothing to rethink), the authors sent Ike to school and took away her magical abilities, in exchange for teaching her how to fight and shoot well.
Pantsu suddenly became less, apparently decided to do the plot. From this, he became quite crazy here and lost pleasant echoes of militants from the 80s - early 90s, now the basis is fan fiction about a school with a rich lady. Villains are strange, conflicts are incomprehensible. It is obvious that the plot tried to deepen, but obviously could not. Although in the second season (Zero) the story was significantly better than in R-16.
The quality of the animation and detail have also blown away, although, as in the original, the people here are drawn anatomically neatly. What was normal for a budget OVA from the end of zero became suddenly very expensive for many titles ten years later (I'm looking at you, Sailor Moon).
All of the above makes a sequel to Aiki a good choice for the evening, but it is better not to watch it immediately after the original story - the contrast will seem too bitter.