Things to do for the walkthrough

Auto-patrol Idol Patrol (with ads) Collect diamonds through daily missions and ads, exchange them for Ace Boxes, and strengthen characters. Watch ads to spin the Mega Roulette. Strengthen attack power and HP from the Officer Academy in the bottom right. Do the events. Do the dungeons. While watching ads to expand the area during battles is necessary, you can easily clear content by collecting materials every day. If the hidden quests disappear, I don't think I'll continue playing.