User blog comment:Inept Wiki User/Index III, IV etc - which stuff where?/@comment-110.175.14.152-20140402111452/@comment-110.175.14.152-20140402140843

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While Volume SS was effectively Volume 13.5, Volume SS2 in particular has little impact on the immediate story. That's why 5 minute ONAs which stream separately (similar to Chu2koi lite) would be a good accompaniment to the main series as well. I could probably add Love Letter SS to the ONAs as well. Most importantly, with SS2 out of the way, it leaves more room in the episodes to adapt the 6 other LNs better.

Now that it is mentioned, not all of Volume SS has been adapted, the series could use an Episode 0 which adapts the rest of SS and immediately lead into the Terra of the Left Arc while detailing the setting, conflict and aftermath of the 0930 incident; something Index II didn't do at all.

If structured right, a theoretical Season 3 could be a decent adaptation. If the animators try to cram as many novels into the series as possible, then I would fear the outcome.