Idle Gacha, never think that it's possible.
Gacha is endless thanks to the mechanics but it's mostly bad gacha most of the time, I meant it by most of the time.
SSR is an rarity, getting it means your lucky. SR is friendly cause they can be made to be stronger than SSR faster.
It's still an IDLE so you can't basically just keep playing nonstop since it's gonna take a while before you grow stronger.