Before their debut in mid-2013, Boys Republic, as a band, they have received two years of training under Universal Music and Jung Hae IK of Happy Tribe Entertainment, who has helped to produce first generation idols such as g.o.d, H.O.T, and S.E.S.

[6] In the months of June and July, SBS MTV aired the group's eight episode reality show "Rookie King: Boys Republic.

The second teaser illustration further conveys the concept with each of the group member posing as their favorite superheroes: Onejunn as Spiderman, Sunwoo as Wolverine, Sungjun as Ironman, Minsu as Batman, and Suwoong as Super Mario.

"Video Game" is produced by Keun Tae Park, written by Jin Choi and Danish songwriter Mage, and composes of Hybrid-Electronic Trap (H.E.T.)

[25] At 11:11 pm of November 11, Boys Republic Official YouTube Channel published the music video for "The Real One", disclosing their latest concept of "Modern vs. Classic", the fashionable man transcending time and space.

The title song is written and composed by Duble Sidekick with rap lyric contribution from Boys Republic's Minsu.

[26] "Real Talk" track list contains their 2014 singles, "Video Game" and "Dress Up", along with their first ballad song, "Like a Doll", and Onejunn's self written and composed "Somnambulance."

On November 27, in Japan, at Tower Records Shibuya, Boys Republic held their first Japanese showcase in front of a crowd of 1,000 fans.

[28] December 20, Boys Republic volunteered their service in Gwanghwamun, Seoul, wearing red Salvation Army charity activewear and offering free hugs in the cold weather.

On January 10, they met with their fans at Lucky China Town in Manila and Venice Piazza in McKinley Hill, Taguig.

On January 11, Boys Republic made an appearance on ABS-CBN's Sunday afternoon show, ASAP, before holding their 'meet-and-greet' event in addition to their last performance in Eastwood, Quezon City.

On March 28, they returned to Japan and performed in Yokohama on Pops in Seoul concert stage along with U-Kiss and HOTSHOT in celebration of the 50th anniversary of Korea-Japan diplomatic ties.

[33] In the beginning of May, Boys Republic officially announced the dates and locations of their concerts in eight different cities across Europe, a part of their "European Royal Tour 2015.

"[34] Starting on May 27, they released daily image teasers for their June comeback including the cover and track list of their 4th single album, "Hello.

"[35] During the 2015 Dream Concert held at the Seoul World Cup Stadium on May 23, Boys Republic revealed a snippet of their new, unreleased song, "Hello.

On June 5, the day of their 2 years anniversary since debut, "Hello" was officially released along with the album which includes the acoustic and instrumental versions of "Hello."

On April 5, Boys Republic released a clean version of "Get Down" music video without the provocative and blood splatting battle scene.

On May 14, Boys Republic kicked start their Japan promotion with solo event, Royal Memorial Ceremony Vol.

On June 8 was released BR: Evolution (Japan edition) and a compilation album Shōnen Kyōwakoku 2013-2015 Best, consisting of their popular tracks from 2013 to 2015, including both version of "Hello".