So, this is just an OVA where the characters go to a special survival game called "TCC" or "Top Cosplayers Combat". They have to wear cosplay costumes while playing the game.
The beginning had a 30-40 second recap of what happened in the 12 episodes of the main series, but it never continued Hotaru's confession. I was a little disappointed because I was hoping that scene would get resumed.
Story 7/10 - it was okay but it was pretty basic
Art 9/10 - lovely art with detailed backgrounds
Sound 8/10 - nice background music for the right scenes
Enjoyment 9/10 - there was a lot of funny scenes
and they were great