Hot and beautiful characters, And a decent idle game similar to FGO or SF Duel. The Gacha also seems to be pretty player friendly. As I have pulled 3x S tiers in 10x draws more than once. I'm F2P and this is my characters so far in only an hour.

Extremely f2p friendly, which is the biggest draw. You can get every new character if you do the dailies. And the combat is fast, reactive and fluid. Actually challenging skill based gameplay. Highly recommended.

just like any other MMORPG games. Lot of grinding and tons of quest available here. The  auto battle actually good for who doesn't have time to run around the map and kill opponent one by one. I installed and uninstalled right away coz of this playstyle. I'm too tired with intense gameplay and have no time to grind mats n gears. It's pretty good if you like usual MMORPG games, it has good graphic, music, and a lot to do in game. For f2p, I don't really recommend for serious gameplay, the  disadvantages of typical gacha game u know it, u name it~