Warning possible Spoilers What I really got from this is that it just felt like a need to really show off how sexy the girls in Ichika's harem can be and how it does that is by literally going into their minds. When a program called World Purge affects the academy the girls have to go into a machine to shut it down however this requires the girls to conquer their ultimate desire. For something that was only 44 minutes I thought it provided some entertainment even though it's mainly fanservice entertainment it was fine nonetheless. I thought it was fun seeing how the girls imagined Ichika in theirown way and I thought it was funny how Ichika spoke in the native language of each of the girls like with Laura he was German or with Cecillia he was British.
Despite the fanservice parts there was another battle going on outside and even though we don't get to see the reason behind the attack on the Academy we do get to see pretty good action.
The ending too gave me chills too since it was setting up for a season 3 that may never happen, but if it does it'll definitely be interesting.

There isn't really any character development between the character's other than what their ultimate desires are, however I have to give Josh Grelle credit for trying to make the girls version's of Ichika sound like he's from their country, we also get to see Chifuyu kick some ass for once which just increased her badass level for me althought other than that there really wasn't much difference with the characters overall.

When it comes to the artstyle I did like Chifuyu's suit even though it wasn't an IS unit it was still pretty badass and the settings where the girls illusions were despite looking like sexy encounter places they looked pretty detailed.

The fanservice was off the scale this time and is pretty much the reason why this exists, but I didn't hate it in fact it was pretty good it definitely made some of the girls more sexy or cute like Laura in nothing but an apron or Cecillia getting washed in a bath, it was certainly a good site to see.

Overall this was alright for an OVA, the only thing that really peeked for me was the ending that may have shown a possibility of a season 3 which I hope will happen cause considering what happened at the end it's got me pretty interested for the next chapter in this story.