Question: Which boy band is a star of Good Manager part of?

Context articles: Boy Band (TV series)
Masahiro Nakai
Erol Bekir
Lee Jun-ho (singer)
Good Boy (song)
Mermelada
Imajin
Good Manager
Namkoong Min
One (band)

Boy Band is an American television music competition series that premiered on June 22, 2017 on ABC.
 The 10-episode first season features young male vocalists competing to become a member of a new five-piece boy band.
 The final five boys who form the boy band receive a recording contract with Hollywood Records and perform the band's debut single during the finale.
 On August 24, 2017, it was announced on the live show that Brady Tutton, Chance Perez, Drew Ramos, Sergio Calderon, and Michael Conor were the new members of the boy band, In Real Life.
 They performed for the very first time their first single, "Eyes Closed".
Masahiro Nakai (中居 正広 , Nakai Masahiro , born August 18, 1972) is a Japanese television host, actor, newscaster, radio personality.
 He was the leader of the now defunct boy band SMAP, which had been the best-selling boy band in Asia.
 While working as a member of a boy band, he worked extensively as a television presenter, hosting many of his own talk shows, variety shows, music shows, news programs, and several Olympic games as a sportscaster.
 His conversational method and technique has been critically praised, establishing himself as one of the most well-respected, iconic hosts in the Japanese entertainment industry.
 He is the host of six weekly television programs and one radio program.
Erol Bekir, formerly known as Erol Bekirovski, (born 25 January 1974) is a Turkish-Swedish football manager and former player of Turkish origin with roots from Macedonia.
 He started out playing for his hometown club Malmö FF in Sweden but spent most of his career playing abroad for clubs like BSC Young Boys, FC Lugano, Reggina Calcio, FC Thun and SV Waldhof Mannheim.
 Upon returning to Sweden he signed with lower division Malmö club IF Limhamn Bunkeflo where he also became player manager before retiring as a player and focusing only on the manager part at the end of 2009.
 In August 2012, IF Limhamn Bunkeflo and Bekir went their separate ways after the club announced that they could not match Bekirs level of ambition.
Lee Jun-ho (; born January 25, 1990), simply known as Junho, is a South Korean singer-songwriter, dancer and actor.
 He is a member of the South Korean boy band 2PM.
"Good Boy" is a song recorded by South Korean's duo GD X TAEYANG, members of the boy band Big Bang.
 It was released on November 21, 2014, as the second hip-hop project from YG Entertainment, the first being "Niliria" by G-Dragon featuring Missy Elliott a year prior.
 The single was written by G-Dragon, who also produced it along with The Fliptones and Freedo.
 "Good Boy" became a chart-topper in "Billboard"' s World Digital Songs and a Top 5 hit in the Gaon Digital Chart.
 Additionally, a physical single was released and topped the Gaon Albums Chart.
Mermelada was a boy band from the Dominican Republic.
 During the 1980s, when other Latin boy bands like Puerto Rico's Menudo and Los Chicos, Venezuela's Los Chamos, Spain's Parchis and others enjoyed commercial success across Latin America and Europe, Mermelada was the Dominican Republic's main album-selling boy band.
Imajin is an American R&B boy band that is known for their hit "Shorty (You Keep Playing With My Mind)" featuring Keith Murray.
 The group also made a version of this song with (rapper) Mr. Cheeks of the rap group The Lost Boyz.
 This single peaked at number 25 on the "Billboard" Hot 100, number 20 on Billboard's Hot R&B/Hip-Hop Songs chart and number 22 in the UK Singles Chart in 1998.
 The band was originally put together by record producer Bert Price and inspired by past boy bands such as Jackson 5, New Edition, Hi-Five, Immature, and Mint Condition.
 Original credited band members included Jamal Hampton (who was later replaced by Tony Royster, Jr.), Talib Kareem, Olamide Faison, and John Fitch.
 Faison is the younger brother of Donald Faison of the television series "Scrubs".
 Imajin credited themselves to being a true boy band and are different because each member played an instrument.
 Jamal Hampton and Tony Royster played the drums, Talib Kareem the keyboard, and Olamide Faison played the guitar while John Fitch played the bass guitar.
 After the first album, the group split and John and Olamide made a duo called JizLams.
 During the hiatus, Talib continued to produce songs for various artists such as Solange Knowles.
 Jamal Hampton changed his name to J Star while pursuing a solo career.
 The group continues to produce and sing music together as "Imajin".
Good Manager (Hangul: 김과장 ; Hanja: 金科長 ; RR: "Kimgwajang "; lit.
 "Chief Kim" ) is a South Korean television drama starring Namkoong Min, Nam Sang-mi, Lee Jun-ho and Jung Hye-sung.
 It aired on KBS2 from January 25 to March 30, 2017 on Wednesdays and Thursdays at 22:00 (KST) for 20 episodes.
Namkoong Min (Hangul: 남궁민, born March 12, 1978) is a South Korean actor, director and screenwriter.
 He first gained recognition with neo-noir film "A Dirty Carnival" (2006), and has since received praise for his performances in "" (2015–2016), "Beautiful Gong Shim" (2016), "Good Manager" (2017) and "Falsify "(2017).
ONE was a boy band that first appeared in 1999, recognized as both Greece and Cyprus's very first boy band.
 The band was formed by leading Cypriot-Greek composer Giorgos Theofanous and Minos EMI A&R Manager Vangelis Yannopoulos.
 Constantinos Christoforou and Phiippos Constantinos were on board quite early, chosen by Giorgos Theofanous.
 The next three members were picked up after a selective audition that took place in legendary Athenian Sierra Studio.
 The selecting committee consisted of Natalia Germanou, Posidonas Yannopoulos, Andreas Kouris, Themis Georgandas, Theofanous and Yannopoulos.
 Demetres Koutsavlakis, Argyris Nastopoulos and Panos Tserpes were retained among 179 candidates.
 Christoforou followed a solo career in 2003, and was replaced by another Cypriot singer, Demos Beke.
 In 2005 the band formally disbanded.
 In their 6-year existence they enjoyed much commercial success and earned platinum certifications, as well as having staged memorable performances with successful Greek singers at music halls and in concerts.