Perhaps this would explain the features of the
'A' single better. There are seven. Black is the regular press. Red, blue, green, orange are the limited ones. Then one for it being a million seller, and another for breaking the 1.5 million mark with the gold cover.
A Best- One regular press cover (or slipcase for the first press), plus 6 hidden covers for the first press.
A Ballads- One regular press cover (or slipcase for the first press), and 4 hidden covers for the first press.
Free & Easy- Ayu's face on first press disc art, and just clouds on the regular press disc art.