<P> The group's first studio album, XOXO was released on June 3, 2013 with two versions, a Korean - language and a Mandarin - language edition . Unlike the EP Mama when Exo - K and Exo - M had separate promotions, XOXO was jointly promoted mainly in South Korea . Exo recorded the album's lead single "Wolf" together, but the rest of the album tracks were recorded separately . A repackaged version of XOXO, titled Growl, was released on August 5, 2013 with three additional tracks . "Growl" peaked at number three on Billboard's Korea K - Pop Hot 100 and number two on the Gaon Singles chart . All versions of XOXO have collectively sold over one million copies, which made Exo the first Korean artist to sell over a million copies of one album in twelve years, and breaking the record for being the fastest - selling K - pop act . XOXO is the best selling album in South Korea of 2013, winning Disc Daesang at the Golden Disc Awards, and Album of the Year at the 2013 Mnet Asian Music Awards . In December, Exo released the second EP Miracles in December as a special winter album through South Korean commercial outlets and online music stores . Prior to the release, the group promoted the album through their first reality show Exo's Showtime, which premiered on November 28, 2013 on the cable channel MBC Every 1 . </P> <P> Exo's third EP, Overdose, was released on May 7, 2014 . Originally scheduled to be released on April 21, the album was delayed due to the Sewol Ferry Accident on April 16 . Overdose was promoted similarly to Mama, with Exo - K in South Korea and Exo - M promoting primarily in China . The album had over 660,000 preorders before its release, making it the most pre-ordered Korean mini-album in history . The Korean edition also peaked at number two on Billboard's World Albums Chart, and number 129 on the Billboard 200, making Exo the highest charting Korean male group act on the Billboard 200 at that time . Overdose became the best selling album in South Korea of 2014 and was the first mini album to top the yearly charts and win the Album of the Year Award at Mnet Asian Music Awards . By the end of 2014, Exo was Japan's best - selling K - pop artist of the year . </P> <P> On May 15, 2014, S.M. Entertainment confirmed that Exo - M's leader, Kris, had filed a lawsuit against the agency to terminate his contract, stating violation of human rights as the main reason . The group began their first headlining tour "Exo from Exoplanet 1--The Lost Planet" on May 24 at the Seoul Olympic Gymnasium . Tickets for the concert sold out in 1.47 seconds, breaking the record for the fastest sold out concert by a Korean artist . On October 10, Exo - M's Luhan also filed a lawsuit against S.M. Entertainment to nullify his contract, because of health issues and being treated differently than the Korean members, therefore having no promotions . S.M. Entertainment announced that Exo would continue to promote with 10 members . </P> <P> Exo released their second studio album, Exodus on March 30, 2015 in both Korean and Mandarin versions . Domestic pre-sales for the album surpassed 500,000 copies within 24 hours, setting a new record for pre-sales . The title track, "Call Me Baby", was released early on March 27, due to leaked versions of the song . The music videos were released four days later, with the Korean version later becoming the most watched K - pop music video in the first half of 2015 . The album's Korean version also broke records after staying at number one on the Gaon Album Chart for four consecutive weeks . Exodus eventually went on to sell over a million copies, and is the group's second album after XOXO to do so . It was named Album of the Year at the 2015 Mnet Asian Music Awards, making this the third consecutive win in this category for the group since 2013 . In May, Exo broke the record on Billboard as the highest ranking Korean artist, topping at 90th place . Exo also entered the Canadian Billboard Hot 100 chart at number 98, making them the first K - pop group and second Korean artist to enter the Canadian chart . </P>

Who are the members of exo that left in order