Originally Posted by Opalia24

So total 8 new girls:

1) N-M Ai Mochozuki - From stage 14.7-14.9, bonus stage and GHQ.
2) N-B Hibiki - From stage 14.4-14.9, bonus stage and GHQ.
3) N-M Mistress Shirio - from bonus stage only
4) N-M Megumi Komoto - from bonus stage only
5) N-M Kana Mizushima - From GHQ Sunday only
6) R-S Aoi Mihashi - Reward from finishing stage 14.9, GHQ and Bonus stage
7) SR-S Naromi Seto - From stage 14.1-14.9, Bonus stage and GHQ
8) SR-B Maho Matsunaga - From GHQ Sunday only

I think you missed one. Sayuna Matsumori. I'm still trying to find where she is hiding. But I think its safe to say she is not in the bonus stage.

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Originally Posted by nip101

Wait was the new area only open for 2 hours?

On the "Sunday only" area, the areas change once every 2 hours.