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School Trilogy[1] (학교 3부작) is the first Korean-language and Japanese-language era of BTS' career. It started on June 12, 2013 with their Korean debut single album "2 COOL 4 SKOOL" and officially finished on November 20, 2014 with "Danger (Mo-Blue-Mix) (Feat. Thanh)" music video.

Meanwhile in Japanese-language, the era started on May 23, 2014 with their first Japanese compilation album 2 COOL 4 SKOOL / O!RUL8,2? and officially finished on December 24, 2014 with their first Japanese studio album WAKE UP.

All the content released in this era has the concept of "a defiant teenager".[2] This era is the first part of the Chapter 1: Reflection of Youth and the first part of the BTS Chronicle.[2]




All the Korean-language and Japanese-language content released in this era have the concept of "a defiant teenager"[2] as both have the same songs only in different languages.


  • 2 COOL 4 SKOOL: An honest look at BTS's conviction and passion for making music with a message on resisting against social bias and oppression.[3]
  • O!RUL8,2?: A Message to teens living a bleak life of pain and anguish that they have to find happiness in their lives before it's too late.[3]
  • SKOOL LUV AFFAIR: An ode to dreams, happiness and love, with an emphasis on school and teen life.[3]
  • DARK & WILD: Acollection of tracks that explore the unique power of hip hop and demonstrate the musical direction BTS is taking,[3] and the meant is to be a direct continuation of the theme in their previous release.[5]
    • "Danger": Title track, and is about a man who has started dating but isn’t receiving equal attention from the girl he loves.[5]
    • "호르몬 전쟁 (War of Hormone)": Follow-up track, and is about the raging hormones a hot-blooded young man feels when he sees a girl who is perfect front and back, and top to bottom.[6]



List of content released in this series.

Title Type Released
"2 COOL 4 SKOOL" Single album June 12, 2013
'No More Dream' Official MV Music video
'No More Dream' Official MV (Choreography Version) Music video June 17, 2013
'We Are Bulletproof Pt.2' Official MV Music video July 16, 2013
O!RUL8,2? Comeback Trailer Comeback trailer September 5, 2013
O!RUL8,2? Mini album September 11, 2013
'N.O' Official MV Music video
SKOOL LUV AFFAIR 'Skool Luv Affair' Comeback Trailer Comeback trailer February 2, 2014
SKOOL LUV AFFAIR Mini album February 12, 2014
'상남자 (Boy In Luv)' Official MV Music video
'상남자 (Boy In Luv)' Official MV (Choreography Version) Music video February 20, 2014
'하루만 (Just One Day)' Official MV Music video April 6, 2014
SKOOL LUV AFFAIR SPECIAL ADDITION Repackage album May 14, 2014
DARK & WILD 'What Am I To You' Comeback Trailer Comeback trailer August 5, 2014
DARK & WILD Studio album August 19, 2014
'Danger' Official MV Music video
'호르몬전쟁' Official MV Music video October 21, 2014
"Danger (Mo-Blue-Mix) (Feat. Thanh)" Digital single November 20, 2014
'Danger (Mo-Blue-Mix) (Feat. Thanh)' MV Music video

Title Type Released
2 COOL 4 SKOOL / O!RUL8,2? Compilation album May 23, 2014
'NO MORE DREAM -Japanese Ver.-' Official MV Music video May 25, 2014
"NO MORE DREAM -Japanese Ver.-" Single June 4, 2014
'BOY IN LUV -Japanese Ver.-' Official MV Music video July 4, 2014
"BOY IN LUV -Japanese Ver.-" Single July 16, 2014
'Danger -Japanese Ver.-' Official MV Music video November 9, 2014
"DANGER -Japanese Ver.-" Single November 19, 2014
WAKE UP Studio album December 24, 2014


List of events promoting the releases from this era.