Touhou LostWord: To Play or Not to Play?

Pros -I'm an otaku (especially if you like "Touhou Project") -I like turn-based games -I want a game with no ads -My English skills are good -I want to skip the story and just fight (possible!) -I want a game I can enjoy without spending money (possible if you're not greedy) Cons -I'm looking for a game that supports Korean (The one on the platform is the "Global" version. It only supports English) -I don't like complicated things (Surprisingly, there's a lot to consider during battles) -I want a lightweight game in terms of storage -Hidden quests and time-limited quests are important (They were barely added after the author requested them... so there's no way they exist.)