[1] Since their debut, they have released another two studio albums and gained public recognition for their performances on Immortal Songs: Singing the Legend, festivals and other televised concerts.

Jo Mingyu got the nickname " Strategist" during the competition because he meticulously considered each contestant's timbre and whether they would match his voice before selecting them.

[4] As the winning group, they won prize money as well as an exclusive contract with Arts & Artists, which manages some of the country's preeminent classical musicians, to promote together for a year.

[5] Bae is a musical actor who had studied acting at the Korea National University of Arts and occasionally sang for Aux, a gugak-rock fusion band.

[8] Kang is the only member without any formal training in either music or the performing arts, although he was the vocalist of an amateur rock band he and some friends had formed as college students.

[10][4] While on Phantom Singer 2, the members already differentiated themselves from other contestants for their willingness to experiment with other genres and for their "adventurous" song selections, a reputation which persists to this day.

[12][13] Forestella debuted on March 14, 2018, with the full-length album Evolution, which was praised by critics for showcasing the members' vocal abilities and reinterpretations of songs from a wide spectrum of genres.

[16][17] After their tour ended, they held a series of joint concerts with Forte di Quattro, winners of the first season of Phantom Singer.

The song was pre-released as a digital single by Secret Garden and later included in the South Korean and Japanese releases of their album Storyteller.

[23] One of the tracks, "Dear Moon" (달하 노피곰 도다샤), was released as a promotional digital single two weeks prior and was based on a Baekje-era poem entitled "Jeongeupsa" (정읍사).

[41] According to statistics compiled by the Korea Performing Arts Box Office Information System (KOPIS), Forestella ranked first in ticket sales within the "classical and opera" category for the first half of 2021.

[42][43] On August 2, it was announced that the group signed with Beat Interactive after terminating their contract with their previous management two months earlier, although the individual members remain under their respective agencies for their solo activities.

On May 30, 2022, the quartet released their first mini-album under their new label, The Beginning: World Tree, featuring the single "Save Our Lives" as its title track.

[51] Known to domestic audiences for their appearances on Immortal Songs and KBS's televised public concerts Open Concert, the group has demonstrated their versatility in reinterpreting songs of various genres ranging from trot to gugak (traditional Korean music) and incorporating rock, pop and classical singing techniques into their performances.

[35][62] Regardless of genre, their performances are generally characterized by well-defined harmonies and their unusually wide combined vocal range, anchored by Kang's countertenor and Ko's basso profondo tessiture respectively.