How do we register coupons?

What’s the Trade Card system?

What’s the Item Trade Shop?

What’s the Sell Card system?

Does playing a Full or Short version of a song give you the same amount of EXP?

I can't equip cards that match the number of members in each group.

Can I only perform songs of select groups in Chapter Stages?

How do I equip Buffs?

The music and notes are out of sync.

I can't see the notes while playing the game.