However, Lee Minwoo had dropped out of the list of confirmed members after their first appearance on the sitcom and the fact of him not debuting with BtoB had upset many fans.

On March 23, 2012, Cube Entertainment had clarified that there were problems with Minwoo's health, resulting in him being unable to blend into the group.

[3][4] On March 21, BtoB made their debut in a showcase held in Seoul, which was streamed from their official YouTube channel.

[5] BtoB then released their self-titled debut EP, Born to Beat on April 3 with songs co-written by Jörgen Elofsson.

[12] The following day, they performed at Clarke Quay for "Music Matters Live 2012", a five-night festival that featured 40 bands from 18 countries.

In addition, they held their first Indonesian showcase at the Mandarin Oriental Hotel in Jakarta on June 21, performing for both fans and media officials.

[14] They made their debut in Japan with a performance at the "K-Dream Live" concert at Tokyo Dome on July 29 alongside 5 other groups.

[16] On September 12, the group released their second EP, Press Play along with its title track "Wow", which was composed by hit maker Kim Do-hoon.

[17] On October 18, the group started promoting the follow-up single "Lover Boy" (사랑밖에 난 몰라; lit.

A music video for the song was released on October 22 which consisted of a montage of the promotional events the group undertook throughout the year.

They started off in Singapore on December 1, performing as part of a line-up for "Sundown Festival 2012", an event that invited solo and group acts from South Korea, China, Hong Kong, Taiwan and Japan.

[20] On December 11, the group performed as the opening act for the "2012 Asia Super Showcase" in Kuala Lumpur, Malaysia at Kenanga Wholesale City.

[21] The group became the first Korean artist to perform at the Thai Supermodel Concert on December 13 at the Bangkok Convention Center, and later held a press conference with around 70 media outlets.

[30] On August 29, BtoB released a music video for the track "When I Was Your Man" (내가 니 남자였을때), ahead of their official comeback in September.

[44][45][46][47][48] In October, BtoB signed a contract with a Japanese talent agency, Kiss Entertainment, for the group's activities in Japan.

[57] On April 29, the group held their first major solo concert tour in Japan, "The Secret Diary", six months after their Japanese debut, and reportedly gathered 10,000 fans.

[63] On October 12, BtoB released their seventh EP, I Mean, along with the music video for their title song, "Way Back Home" (집으로 가는 길).

[90] On August 6, BtoB released a special digital single for summer, "I Want to Vacation" (여행 가고 싶어), as a present for fans.

[103] "Someday" is an emotional ballad track composed and written by Im Hyun-sik and co-written by Lee Min-hyuk and Jung Il-hoon.

[106] On August 30, the group released their seventh original Japanese single "Brand New Days" which debuted at number 2 on the Oricon chart.

[citation needed] On February 27, 2018, BtoB was appointed as ambassadors for Korea Tourism Organization, as a boy group who has high recognition overseas and gained popularity.

[133] In August 2018, Lee Min-hyuk was randomly selected as the second leader, during a VLive broadcast, to fill in for Eunkwang, who was due to begin his mandatory military service later that month.

[134] On November 12, the group released a special album titled Hour Moment without the participation of Seo Eun-kwang, with the song "Beautiful Pain" functioning as the lead single.

He was under investigation from the Seoul Metropolitan Police Agency for purchasing and using marijuana in prior years and was also charged for violating the Narcotics Control Act.

[145] The four-member lineup of BtoB participated in Kingdom: Legendary War, a competition show alongside five other K-pop boy groups, from April to June 2021.

[150] On February 21, 2022, BtoB made their first comeback as a full group of six with their third studio album Be Together with the title track "The Song" composed by member Hyunsik.

BtoB Blue released the digital single, "Stand By Me" (Korean: 내 곁에 서 있어줘; RR: Nae Gyeote Seo Isseojwo), on September 19, 2016.

BtoB decided to begin this special donation event to let the public know that they genuinely wish to support those who feel lonely and lost, just like the lyrics in their title track, "It's Okay".

[187][188][189] On April 12, 2019, World Human Bridge, an international relief development NGO announced that BtoB's fan club 'Melody' has donated ₩1,950,000 under the name of 'BtoB & Melody' to help the victims of Sokcho Fire.

The donation is the sum of seven BtoB members' ages and will be used to support the daily necessities and food for 1,000 Goseong victims.