Im Jin-ah (born September 14, 1991), known by her stage name Nana, is a South Korean singer and member of girl group After School. She is also a member of its subgroups A.S. Red and Orange Caramel, and the super idol group Dazzling Red. Nana is a current member of the South Korean variety show Roommate. She was ranked at #2 on The 2013 Independent Critics List of the 100 most Beautiful Faces and #1 in 2014. 
Before her debut as a member of After School in 2009, Nana was a participant in the 2009 Asia Pacific Super Model Contest and she walked the runway for the ‘Girls Award‘ event in Japan. Nana is a licensed makeup artist and also has a membership at the Makeup Artists Association.
In November 2009, Nana along with Raina debut in After School as third generation members. Nana officially debut with the group for the release of their second single, "Because of You", which attained No. 1 on the Gaon Singles Chart and won the "triple crown" on SBS "Inkigayo"
In March 2010, After School released their third single album "Bang! before the released of first sub-unit. In June 2010, Nana, along with After School members Raina and Lizzy formed a sub-unit called Orange Caramel. They released two mini-albums: "Magic Girl" and "A~ing♡". Nana has then gone on to record a solo song, which is included on the "Shanghai Romance" single, titled "Close Your Eyes". She is also a member of After School's temporary sub-unit A.S. Red together with Kahi, Uee, and Jungah and promoted "In The Night Sky" in 2011 before debuting in Japan.[better source needed] In 2012, Nana had a solo song included on the After School's Flashback maxi-single, titled "Eyeline".[better source needed]. The title track "Flashback" topped many major music charts in South Korea.
In 2012 Nana was a runway model for the Tokyo Girls Collection 2012 Spring/Summer.
After School's Nana became the main model for Korea's biggest diet brand, Juvis. This is her first solo CF[expand acronym] as an After School member.
In May 2013, After School released their sixth single, it was revealed that the title track is called "First Love"
Orange Caramel made a comeback on March 12, 2014 with their third single album "Catallena" During promotions for "Catallena", it was announced that Nana would be a member on a new variety show on SBS called Roommate. The show features multiple other celebrities and has quickly built up a fanbase not only in Korea, but internationally as well. Nana is a returning cast member to the second season which first aired on September 21, 2014.
Orange Caramel returned with their fourth single album titled "My Copycat" on August 18. 
In November 2014, Nana was cast in a Chinese television drama. The drama is a remake of Queen In-hyun's Man titled The Empress' Man. Pledis Entertainment stated, "We are happy that Nana can be part of this project. As this is Nana's first attempt at acting, she is very positive about the new challenge, and the expectations are high. Nana's will to be an actress as well as a singer is very strong. She is preparing diligently, as all the lines are in Chinese."