[6] Rumors of a fourth Japanese single first surfaced when the group was spotted leaving the Incheon International Airport and were said to be bound for Thailand to film a music video or a commercial.

The B-side "Girls Be Ambitious" was used for promoting DARIYA's hair dye product line "Palty".

[9] "To Me" (originally titled "2Me") was included as a bonus track for the Regular CD Only First Press Edition.

[10][11] On May 13, 2011, it was reported that Kara was set to film a music video for their upcoming Japanese single due to be released sometime in June.

The music video was said to be filmed in Phuket, Thailand and the group was spotted leaving the Incheon International Airport during that day.

The full music video premiered the following day at Space Shower TV on June 16, 2011.

The group made an appearance on Count Down TV on July 3, 2011, where they were placed at #1 for the Recochoku "Chaku Uta ®" Top 10 chart.