Just after they wrapped up with their First Japan Nationwide Live Tour to promote their Japanese album, A Shared Dream, U-KISS reportedly recorded a total of 100 songs from international music producers for their comeback in South Korea.

[6] Singer-songwriter Jay Park contributed the "4U (For You)" at the request of long-time friend, main vocalist Soohyun, who is a former JYP Entertainment trainee.

[9] After 8 months of hiatus due to their busy promotional activities in Japan, U-KISS released this mini-album on April 25, 2012, physically and online.

[11] The teaser for DORADORA was also released on April 21, 2012, that made U-KISS to trend first spot worldwide on Twitter.

[11][12] Kpop News [13][14] In May 2012, DORADORA gained first spot on Germany's German Asian Music Chart for the month of May beating BIGBANG's Fantastic Baby.