Son Na-eun and Kim Nam-joo of the group Apink are singing at the mini 7th album ONE & SIX showcase held at Yes 24 Live Hall in Gwangjang-dong, Gwangjin-gu, Seoul on the afternoon of the 2nd.
The title song 'No 1' is a song about the feelings of a woman who has left her mind.
About Kim Nam-joo
Kim Nam-joo is a South Korean actress. Kim rose to stardom in the 1990s in television series such as Model, The Boss and Her House.
 Wikipedia