Yes, I'm still working on the M4M maps. I just lost a lot of motivation.
Opening the fourth round.
It will be a random pick NM round, but the song's artist/performer(s) must be a member (or members) of μ's. It's okay if the songs are not related to Love Live!, or if they are collaborating with non-LL! people (such as fripSide which has Nanjou Yoshino in it).
You can try for A-RISE's members too (which means StylipS' songs are included...), btw. Lower chance, though.