After the success of their debut studio album Rough Draft in Progress released in 2006, they went on hiatus. After that, it was re-united for the live club Sam's last concert before closing, 20002011 in 2011, and with this opportunity, they recorded rheir second album.[2] The album is a concept album about death, and it tells different stories of death throughout from Day 0 to Day 7.[3]
Lee Kiseon of IZM reviewed "Hollow Jan broke down typicality and built the result with a strong commitment to the genre and a belief in the message."[4] The member of the selection committee for the Korean Music Awards Lim Heeyoon nominated the album for best rock album, describing it as "An album like an auditory detail depicting a tumult on the verge of extinction."[5]
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