To unlock all galleries and all animations, you'll have to play all routes. There are different routes for Norika (Femdom, Maledom, Rejected, Blackmail), Yasuka (Love, Corruption) and Asami (Love, Corruption). I'm not sure if it's possible on Android, but see if you can enable "Choice Hints" in the game's preferences, which helps a lot to get the right dialogue options for different paths.
// EDIT: I posted a
Save Game Collection for all combinations of routes, but I'm not sure if you can use those save games on Android.