A few weeks before the album, a remix EP called The Singles Re-Mixed was released.

The album does not feature all of Chara's singles released up until this point.

No Toy (Re-Mix), Ōki na Jishin ga Kitatte (大きな地震がきたって, Even If There's a Great Earthquake), Mujintō ni Watashi o Motte Itte... (無人島に私をもっていって・・・, Take Me to a Deserted Island...) and Gifted Child are left out entirely.

The album appears to be named because of her songs Baby Baby (featured on Happy Toy) and Soul Kiss xxx, however neither songs are on this collection.

Soul Kiss xxx is the only album title track not present.