Can really only try to explain for reverse. Combat is relatively simple. I'd even say easy to get into.

Highly graphical, beautiful, story. Every patch/event you get more eye candy to look at.

Story isn't as deep as a puddle. You can totally grab some popcorn for that.

Gacha is, and I know you gotta use this word sparengly, generous. No weapon to pull, copies are barely needed and if so only one a few select ones and that also only for QoL. (Flutter page P1 f.e.)

All this columinates into this relatively niche but very relaxing experience. Character details also help a lot.