Managed to get true ending this time ^^
Still not sure about the exact conditions, but I did max Noire’s lily ranks beforehand.
The developers provided this option to choose which ending to go:
I’m left with one huge grind basically, maxing everyone’s levels and lili ranks… -.-”
I’m still missing one picture in the gallery though…
There’s one more ending? 0.o (maybe I need to max the other goddesses’ lili ranks as well so they also show up in the photo shoot of the true ending?)
Now that I’ve played the game twice, I feel the story is pretty light. 80% of it is like just for meeting the new characters ^^;