I think this is one of most badass card game (turn-base) on the market for now. Stunning graphics, amazing ost dan f2p friendly, been playing since day 1 and i have very great experience playing the game. The only downside of it was the lack of content but that's what brought me honestly, as busy person now i only like play games for two hours a day.
Story is great because the dev using realtime event/history as reference, so its rich with potential.
Music/voice line just do some your own research but i can tell ya'all this dev is nuts like the dev of AK & BA. Mainly British accent but jp/cn VA also available and they did great job with the english one imo.
Gameplay just so-so tbh since its card, but ingame content theres some unique features/game like UTTU and okayish mechanic.
F2p friendly ? Yes, sure the game /in-game rewards/freebies wont let you collect all the meta characters but every patch they give you income like 60 pulls with 50:50 70pity gacha system without many codes they throw us every patch. Just need a bit careful who to pull and yourazz is saved :)