[1] This was the first album to release after the return of Kim Hyun-joong (participating in Boys Over Flowers during previous album promotions,) and Park Jung-min (who was previously participating in musical, Grease.

)[3][4] and SS501's project group and unit album, U R Man,[5][2] The album consists of a solo tracks for each member that showcase each member's individual talents and charisma: Kim Hyun-joong's edgy R&B dance track "Please Be Nice To Me"; Heo Young-saeng's self-written ballad song "Nameless Memory"; Kim Kyu-jong's light and energetic urban pop song "Wuss Up" featuring Taewan a.k.a.

C-Luv & Star Trak; Park Jung-min's mid-tempo ballad "If You Cannot" featuring Ji-sun; and Kim Hyung-jun's sexy dance-song "Hey G".

Moreover, SS501 shot a sensational 20-minute blockbuster-style music video that brings the songs and members together for a thrilling musical story in which Kim Hyun-joong, Park Jung-min, and Kim Kyu-jong play rival killers.

[6] In August 2009, SS501 released a limited and deluxe version of the album in Taiwan.