Gothic Melting Ice Cream's Darkness Nightmare is the first compilation album from Tomoko Kawase's alter ego, Tommy heavenly6.

[2] It was released on the same day as Strawberry Cream Soda Pop Daydream, a best-of album by Kawase's other alter ego Tommy February6.

The album contains all of Heavenly6's singles from Wait Till I Can Dream to Papermoon in consecutive order, in addition to select album tracks from Tommy Heavenly6 and Heavy Starry Heavenly and a B-side from Hey My Friend.

The DVD contains music videos of Heavenly6's singles, "Swear" (from Wait Till I Can Dream), and "Unlimited Sky".

A limited digital download single titled "Unlimited Sky" was released to promote the best album.