[1][2] Cockayne Soup was the "first part" of a release campaign for three consecutive EPs, one per month, followed by Akuyuukai and Spermargarita.

[5] Describing the four tracks, visual kei portal Visunavi assimilated "Beautiful 5 [shit]ers" as hard and heavy.

The portal reported that "Shiawase na Hibi" (幸せな日々) employs melancholic melody and lyrics.

Describing the latter track, they opined that the lyrics are "interesting to read" and are fused with heavy sounds, with a sad and impressive melody.

[6] This last track was originally released on the single "Gozen 0-ji no trauma Radio" (2002), and for this EP it was re-recorded with new drummer Kai.