"I'm a Loner" (외톨이야 ; "Oetoriya") is a song by South Korean pop-rock idol band CNBLUE.
 It is the debut and lead single to the band's first mini-album "Bluetory".
 Written by Han Seong-ho and Amen, the punk-rock track was released under FNC Music on January 14, 2010.
 Upon its release, CNBLUE achieved immediate commercial success; the song earned the band its first two music show wins on Korean Broadcasting System's (KBS) "Music Bank" and Seoul Broadcasting System's (SBS) "Inkigayo".
 Unprecedented at the time, CNBLUE held the record for shortest period between debuting and earning a music show win for four and a half years.
 The song also peaked at number two on the Gaon Digital Chart.
2gether is the second studio album by South Korean pop rock idol band CNBLUE.
 It was released on September 14, 2015, under FNC Entertainment.
 After ending domestic promotions for "Can't Stop" (2014), the band concentrated on individual activities; most notably, frontman Jung Yong-hwa released his debut solo album "One Fine Day" (2015) in January.
 The remaining band members sought out opportunities in television, particularly in acting, variety show appearances, and MCing.
 In August 2015, it was announced that CNBLUE would release its second studio album after an absence lasting one year and seven months.
 With "2gether", the band decided to change the direction of its music; it stripped itself of the acoustic tracks it was known for and explored electronic dance music in order to create a particular color and form a distinctive sound.
2013 CNBLUE Blue Moon World Tour was the 2013 live concert tour of South Korean rock band CNBLUE in support of their fifth EP, "", which was released on 14 January 2013.
 The world tour commenced, at the conclusion of promotional activities in South Korea, with one show in Taiwan in April 2013 and scheduled concerts for Singapore, Thailand, Hong Kong, South Korea, Australia, Philippines and Malaysia, thru August 2013.
 Subsequent concert dates added China and Indonesia; and extended the tour into January 2014, for concerts in the United States,Mexico, Peru, and the final concert in Chile, for a total of 20 concerts in 14 countries and 18 cities.
"White" (stylized "WHITE") is a song by South Korean rock band CNBLUE.
 It was released on April 8, 2015, as their ninth single under Warner Music Japan and 12th single overall in Japan.
 The song was conceived by guitarist Lee Jong-hyun in midst of the CNBLUE 2014 Arena Tour "Wave" concerts.
 The song was written by band members Lee Jong-hyun and Jung Yong-hwa, in addition to miwa.
 Portraying a message of hope, "White" combines the band's rock style and infuses a synthesizer to create a sound distinctive from the band's previous work.
Hospital Ship (Hangul: 병원선 ; RR: "Byeong-wonseon " ) is an South Korean television series starring Ha Ji-won and Kang Min-hyuk.
 It airs on MBC every Wednesday and Thursday at 22:00 (KST) starting August 30, 2017.
Thank U is the debut Japanese studio album by the South Korean rock band CNBLUE.
 The album was released on March 20, 2010 in Japan and the majority of the songs were sung in English with the exception of "voice" and "a.ri.ga.tou."
 Several of the songs on this album were later released in Korean in the band's debut Korean album, "First Step".
 This album is the first of the two indie albums CNBlue released before signing with Warner Music Japan for their major Japanese debut on October 19, 2011.
 The album sold over 10,237 copies.
Now or Never is an extended play released by South Korean band CNBLUE on August 19, 2009.
Can't Stop is the fifth Korean mini-album (ninth overall) by the South Korean rock band CNBLUE.
 It was released on February 24, 2014 with the track "Can't Stop" as the promotional single.
 This mini album marks a whole turn on CNBLUE's music.
 Its lead singer, Jung Yong-hwa ditches the guitar and plays piano on most of the songs.
 The style of this album is, as its leader singer stated on an interview, a bit of brit rock meets melodic pop rock and even Latin melodies that can be heard in Diamond Girl.
Kang Min-hyuk (; born on June 28, 1991) is a South Korean musician, singer-songwriter, and actor.
 He is the drummer of South Korean rock band CNBLUE.
Blueming (stylized BLUEMING) is the sixth extended play by South Korean band CNBLUE.
 It was released on April 4, 2016, under FNC Entertainment and distributed by LOEN Entertainment.
 The band began developing the record within the same time period as "Cinderella" from "2gether" (2015).
 Writing and recording for the album commenced in midst of the 2015 CNBLUE Live "Come Together" concert tour.
 Upon its completion, the band's record label announced that the quartet would release a mini-album.

Question: When was the co-lead of the South Korean drama Hospital ship who is also a drummer in the South Korean band CNBLUE born?
Answer: 1991