That's stange, you only need to clear 2-4 and accept the missions that come with it. Are the music room and the field still unlocked? If the music classroom is unlocked, you should be able to access there and see the first diva there. The diva button form the menu is just a shortcut, if you have the music room unlocked, it should be working.

It's not a matter of level, as i'm at lvl 7 and had it unlocked since lvl 6 at least. Check in the ALL tab in the missions menu for any non accepted mission.


Btw, sniddy, those throphy things in the missions are just titles. Pure decorative things, that's what you see below people names in practice. For evolution, item needed are drops from maps. Out of the 3 needed items, one drops in 3-3(HG) 3-4(SMG or SG, don't remember), and i guess the ones for other classes drop in map 4. The second item drops in 3-5, and the third one needed... no idea xD.

But yeah, game is hella grindy, from lvls to clearing maps to evolving (to evolve you need 40 of each item....so at least 80+ runs per unit). Recovery times go to the hour range just at lvl 15, there is no easy way to farm elixirs, no expeditions to gain resources over the cap easily, heard the event will require absurds amounts of runs, getting new units is also meh... This is basically Kancolle (one of the grindiest games evah), but done wrong in several places, specially user interface things. And with memory leak or lag. Oh, and suspicious AI ¬¬ (friendly units moving to places where they have a 40% less chance of hit while also getting in range to be blasted by SG. Or enemies ignoring easy targets and going for that far away an almost at break status character, which of course they hit despite a 20% chance or so.)

Anyway, just found a user with 2 lvl 40 units at practice, with the other 4 at 20~25 more or less. I went with my team with an average lvl of 10. I managed to pull a B-rank win somehow and got a real good amount of exp. In the end, only the unit at lvl 5 leveled up. This game sure is grindy ._.