Yep, this definitely is a recap episode. This episode recaps episodes one through six of Bokutachi no Remake. Smashing six episodes into one recap is quite tricky, but they managed to do it quite well despite it. Additionally, considering the first episode of Bokutachi no Remake is an hour long, it's good for people who simply don't have the time to watch the main series. Unfortunately, no new footage or audio was made for this episode, so there really isn't anything to gain for people who have already watched the main series beyond a reminder of the story. It's a good refresher, but that's all it is at theend of the day. It's pretty likely this was made to recycle footage, and it definitely does that, but in the end I can't help but skim over it when I've seen the source material.