[1][2] Zzzaam was formed in 1997 and gained popularity by performing at several live clubs in Hongdae.

The album was initially produced with only a limited number of CDs.

[1][4] John Wohlmacher of Beats Per Minute reviewed "Combining the distorted, psychedelic folk of The Velvet Underground with the guitar washes of Slowdive and Pale Saints and the hazy vocals of Kevin Shields, Seoul’s zzzaam created a sound that is wholly unique.

"[5] Na Wonyoung of Weiv described the album as "They made an album that felt like they were taking a shallow nap on a drowsy day: moving between reality and dreams of sleeping with various shoegaze noises.

"[2] Visla Magazine's Jeong Imyong said "Other works on the theme of 'sleep' are usually extended to 'dream' and expressed as a floating sound, but Siesta depicts somewhere between the increasingly blurred consciousness and unconsciousness, excluding techniques.