BTS'S debut single album 2 Cool 4 Skool, the first installment in their "school trilogy" series, was released simultaneously with its lead single "No More Dream" on June 12, 2013. While the album peaked at number five on the Gaon Album Chart and sold over 105,000 copies, "No More Dream" and the subsequent single "We Are Bulletproof Pt. 2" were not major hits. Expanding their endeavors into Japan, "No More Dream" was later re-recorded in Japanese and released on June 4, 2014.
The second part to the "school trilogy" was the extended play O!RUL8,2?, released on September 11, 2013, which sold over 120,000 copies to date and peaked at number four. Its supporting singles "N.O" and "Attack on Bangtan" (Korean: 진격의 방탄) failed to chart high. That same month, BTS starred in their own variety show, SBS-MTV's Rookie King Channel Bangtan, based on a fake broadcast station, "Channel Bangtan", through which members parodied variety shows such as VJ Special Forces and MasterChef Korea. At the end of the year, BTS was recognized with several New Artist of the Year awards, including the 2013 Melon Music Awards and Golden Disc Awards and the 2014 Seoul Music Awards.
The last act to their "school trilogy", Skool Luv Affair (2014) topped the Gaon Chart and sold over 200,000 copies. It also peaked at number three on Billboard's World Albums Chart. The album was supported by the singles "Boy in Luv" (Korean: 상남자) and "Just One Day" (Korean: 하루만). That June, BTS participated as judges for a K-pop cover dance competition in the Bridge to Korea festival in Russia, an event that aimed to promote tourism between the two countries, where they also performed on stage. In August, the group also attended KCON in Los Angeles
That same month, they released their first Korean studio album, Dark & Wild, which peaked at number two on the Gaon Chart and sold over 200,000 copies. It was supported by two singles: "Danger" and "War of Hormone" (Korean: 호르몬 전쟁, )
From October, BTS held "BTS 2014 LIVE TRILOGY : EPISODE Ⅱ THE RED BULLET", the first single world concert tour.
In the spring of 2015, BTS started the Youth spring trilogy " Flower-like Year Anniversary (화양연화) series" following the school trilogy. As the word that best describes youth, the word "flower-like year anniversary" meaning "the most beautiful moment in life" was chosen. This album focused on the dangers of youth's beauty and its essence by painting the anguish and conflict of the process that the boy graduated from school, growing into a youth.
The lead single "I Need U" was a top five hit on the weekly Gaon Digital Chart in South Korea and garnered BTS their first ever music show win on SBS MTV's The Show. Although the second single, "Dope (Korean: 쩔어)", peaked at number 44 on the weekly Gaon Digital Chart,its music video became BTS' first to accrue over 100 million views on YouTube in October. "Dope" later peaked at number three on Billboard's World Digital Songs Chart. The Most Beautiful Moment in Life, Part 1 have sold over 300,000 copies to date.
In December, "Flower-like Year Anniversary Pt. 2" will be released as the second series of the series. It sold about 300,000 copies and ranked in 171th place on Billboard 200.
Flower-like Year Anniversary, Part 1 and Part 2 were later combined into the Young Forever (2016) edition, and was supported by three singles: the top 40 hit "Epilogue: Young Forever", the top 10 hit "Fire" (Korean: 불타오르네), and the top 20 hit "Save Me". A two-day concert at the Olympic Gymnastics Arena in Seoul was held in May to support the album, followed by their Asia tour
On September 7, 2016, BTS released their second Japanese studio album Youth, selling over 44,000 copies on its first day of release and ranking number one in Japan. Japanese editions of "I Need U" and "Run" were released as singles.
Meanwhile, back in their home country, pre-orders for the group's second Korean studio album, Wings, released that October, accumulated over 500,000 copies within the first week. The lead single "Blood Sweat & Tears" achieved an "all-kill" in South Korea, becoming their first number one hit on the weekly Gaon Digital Chart.Its music video gained over 6 million views within 24 hours, breaking the previous record held on YouTube for the highest number of views of a K-pop group music video within 24 hours.
In early 2017, BTS embarked on their Live Trilogy Episode III: The Wings Tour. That February, pre-orders for the repackaged edition of Wings, entitled You Never Walk Alone, reached over 700,000 copies. The lead single "Spring Day" (Korean: 봄날) topped eight of the major South Korean online music charts, as well as Gaon, and crashed Melon's digital chart due to the high influx of user traffic.[ It also entered the US Billboard's Bubbling Under Hot 100 Singles chart at number 15 with "zero promotions".
Their fifth EP, Love Yourself: Her, was released that September and featured music from The Chainsmokers' Andrew Taggart for the track "Best of Me."[ The lead single "DNA" peaked at number two on the weekly Gaon Chart, while its music video reached over 20 million views on YouTube, breaking the record for most viewed K-pop group music video within the first 24 hours. "DNA" also became the group's first entry on the Billboard Hot 100 at number 85, making BTS the first K-pop boy band to do so and the second Korean act with a Korean-language song.
In November, the group became the first K-pop group to perform at the American Music Awards, raising their profile internationally. They won their second Artist of the Year at the 2017 Mnet Asian Music Awards, becoming the first act to win the award two years in a row