just a pay to win gacha game, terrible item drop rate, stupid stamina system and stupid op characters that only appear at limited time events after that they just make them disappear and you can't roll them with the number of characters available, some may never appear again and you have to roll and play with such characters, guess that one of the trick they try to take money from people and it just bad and unfair to new players, don't waste your time with this game.