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.

Playing since Day 1 of global release never skipped a day and still F2P Will proudly say it's a good game. It has some limits, but with patience you can get almost anyone you need, plus wiki helps with best preparations for each unit. No restrictions on activities you are more then welcome to play anything it offers without limit and providing some good challenges. And my fav part... It's not a labor like most gachas. You can do regular things really fast, and with events you can take just a bit longer, but still somewhat satisfying time.

interesting plot, beautiful arts, easy to play. some of the events are also fun to play and has interesting story. best otome game i've played. gacha is pretty bad tho. i had to hit guaranteed at 100 pulls a few times, and banner upon banner that you have no time to raise schips for gacha :') but def playable in f2p as long as you can be selective on which cards you really want