Kim Nam-joo of the group Apink is singing at the mini 7th album ONE & SIX showcase held at Yes 24 Live Hall in Gwangjang-dong, Gwangjin-gu, Seoul on the morning of the 2nd.
The title song 'No 1' is a song about the feelings of a woman who has left her mind.
About Apink
Apink is a South Korean girl group formed by IST Entertainment. The group debuted on April 19, 2011, with the extended play Seven Springs of Apink.
 Wikipedia