This game pretty fun to play. But lately, this game rotation change from building character to gacha your best unit. The pity system is not helping at all since you still can suck the pity and not guaranteed for next time. There's so many times i got my hope for the banner unit and the gacha just dropped me to the bottom because i already got and max this unit level. Personally, I think F2P are not recommended to play this game since the spending for gacha too expensive, but for story was good.