Thanks to heads up from a few people, I discovered that there’s a ura version of it as well. It’s basically set in the same time, only from a different point of view, and more of the characters are introduced, including Minorin’s Kooba, where she seems to be playing the cute but sharp “tsukkomi” character type. She’s the loli with the grey hair and black ribbon in the OP, btw.
Kaya is also introduced, and like most Fumika Orikasa roles, she’s instantly noticeable and likable, playing as, apparently, an ojousama who wants to explore the tower as well. Also we get to see more of the real Fatina (Yui Horie), and she’s like Yoko + Naru at the same time. I love it.
For those who want to watch the “ura” episode 1, unfortunately the only source of it I can find is from Nico Nico. Actually, it does make me wonder, will they only show the “omote” or “front” episodes only for free, while the “ura” episodes are going to be only for paying customers? I hope that doesn’t happen. Most likely this is just a one-time only thing. However, if it does prove to be correct, then Gonzo has definitely got a shrewd business plan.
UPDATE: After doing additional research, it seems that the “ura” version was only aired on GyaO, the Japanese partner for Gonzo’s video streaming plan. Without having to mention, it is for the paying customers only. I don’t see them making it a viable plan for different POV episodes for the future ones, but if they do… I sure hope they can pull it off.