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Debutes: June 13, 2013 ( in South-Korea-time )
The group's name, BTS, stands for the Korean expression Bangtan Sonyeondan (Korean: 방탄소년단; Hanja: 防彈少年團), literally meaning "Bulletproof Boy Scouts". According to member J-Hope, the name signifies the group's desire "to block out stereotypes, criticisms, and expectations that aim on adolescents like bullets". In Japan, they are known as Bōdan Shōnendan (防弾少年団), which translates similarly. In July 2017, BTS announced that their name would also stand for "Beyond the Scene" as part of their new brand identity. This extended their name to mean "growing youth BTS who is going beyond the realities they are facing, and going forward."
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On June 12 (13), 2013, BTS released their debut single album "2 Cool 4 Skool".

While the album peaked at number five in South Korea and eventually sold over 145,000 copies, it was not a major hit, selling only 24,000 copies in 2013.

"No More Dream"

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Released: June 13, 2013

Peaked at number 124 in Korea before quickly falling off the charts.

To all the youngsters without dreams

"We Are Bulletproof pt. 2"

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Released: July, 2013 (MV)
While you guys partied
I gave up sleep for my dreams
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In September 2013, BTS released the second part to their "school trilogy,” the extended play ''O!RUL8,2?''

The EP peaked at number four in Korea and has sold over 160,000 copies to date, including 34,000 copies in its release year.

"N.O"

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Released: September 11, 2013

Peaked at number 92 in Korea. Despite several performances on Korean music shows, the single quickly fell off the charts.

Everybody say NO!
It's not going to work anymore
Don't be captured in others dreams
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The last act to their "school trilogy", the EP ''Skool Luv Affair'', was released in January 2014

Topped the Gaon Album Chart, selling 100,000 copies in 2014 and over 250,000 copies overall. It also marked BTS’ first appearance on Billboard's World Albums Chart, peaking at number three.

"Boy in Luv (상남자)"

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Released: February 12, 2014

Peaked at number 45 in Korea

Hold me tight before I kiss you
Before my heart lets you go

"Just One Day (하루만)"

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Released: April 6, 2014

Peaked at number 149 in Korea

I hope I can be with you for just one day

The repackaged album, Skool Luv Affair Special Edition, was released on May 14, and comprised three discs: one CD with the songs and two DVDs about memorable moments from BTS's showcase. It consists of 18 tracks with only two new tracks: "Miss Right" and "I Like It (Slow Jam Remix)" available for digital release and six additional instrumentals available only with physical purchase.

BTS entered Billboard World Digital Songs for the second time, sending three songs on the chart with the lead single "Boy In Luv" charted at number 5 and another single, "Just One Day" charted at 25 later during its promotion. On February 23, "Boy In Luv" was nominated as the candidate for first place on music program SBS Inkigayo awards. The album debuted at number 3 on South Korea's Gaon Weekly Chart and rose to number 1 two months later during "Just One Day" promotions. The album also peaked at number 3 on Billboard World Albums Chart, marked the first time BTS album charted on international charts, US' Billboard Chart and Japan's Oricon Chart, specifically. The repackaged album debuted at number 1 on Gaon Weekly Chart on the second week of May. Skool Luv Affair was the twentieth best-selling album of South Korea Gaon Album Chart in 2014.