This one is hard to judge. In terms of story it's cliche and boring up until chapter 4. But mc girl dialogues with other characters are hilarious and carry the whole story. But starting from chapter 4 the story gets good. Lots of mysteries will be revealed and some very interesting thoughts discussed. Gameplay, in the beginning it's simple but later it gets insanely complicated. Huge amount of stuff to tweak your characters and teams. You really need a guide to know what you're doing. HSR is a kindergarten level gameplay compared to this game. Gacha rates are good 3% but not very generous with pulls. Anniversary is probably the best time to start the game. Generally I can easily see why this game is so popular in Japan and barely noticeable in global.