I love this rhythm game. At first I deleted
It, because admittedly, the songs are pretty dark, but after downloading it again I have played it every day now. This game made me a vocaloid fan, and even the new characters are cool and engaging and very cute. The only thing that I don't like is the gacha system, but that is to be expected in any gacha game. This has become one of my favorite rhythm games because of the awesome rhythm game style itself. If you are not interested in gacha or the characters or even the music videos, I would recommend SONOLUS, which has a Sekai simulator as well as other games like bandori and voez.