Fromis 9 (Hangul: 프로미스나인 or 프로미스 9; initialism for From Idol School; stylized as fromis_9) is a South Korean girl group formed by CJ E&M through the 2017 reality show Idol School. The group’s name, pronounced as “promise” in Korean, also means “to keep their promise [to viewers] to be the best girl group”. The group is composed of nine members: Roh Ji-sun, Song Ha-young, Lee Sae-rom, Lee Chae-young, Lee Na-gyung, Park Ji-won, Lee Seo-yeon, Baek Ji-heon and Jang Gyu-ri.

The group debuted on January 24, 2018, under Stone Music Entertainment with the release of their first extended play (EP), To. Heart.

In March 2017, it was announced that Mnet, same producer of shows including Sixteen and Produce 101, would be launching a new reality survival show titled Idol School to form a new girl group. The show premiered on July 13 and ended on September 29, 2017 with Roh Ji-sun, Song Ha-young, Lee Sae-rom, Lee Chae-young, Lee Na-gyung, Park Ji-won, Lee Seo-yeon, Baek Ji-heon and Jang Gyu-ri as the nine members of Fromis. The final line-up was solely decided through live and online votes of viewers. Pledis Entertainment, led by CEO Han Sung-soo, managed the group’s training and debut.

Fromis premiered its own reality program on October 19 titled Fromis’s Room about continuing the path to debut. It followed the format of a simulcast, where it combined pre-recorded materials and replays of Facebook Live broadcasts in their dorm. The group’s name was later changed to Fromis 9 following the final episode of Fromis’s Room on November 23, with the “9” meaning the nine students who graduated from Idol School.

On November 29, Fromis 9 performed their pre-debut single titled “Glass Shoes” at the 2017 Mnet Asian Music Awards in Japan. The song was released as a digital single the following day. They also performed the song on the December 15th episode of Music Bank, marking the group’s first-ever appearance in a music program.

On January 8, 2018, it was announced that Fromis 9 would officially debut with their first extended play (EP) titled To. Heart. The EP, along with its lead single, “To Heart”, was released on January 24. The EP debuted at number 4 on the Gaon Album Chart issued on January 27, 2018.

On May 10, it was confirmed that Jang Gyu-ri has entered as a contestant in Produce 48 during M Countdown. Fromis 9 remained as an eight-member group and released their second EP, To. Day, on June 5, without Jang Gyu-ri due to her participation in the show. Fromis 9 went back to being a nine-member group after Jang Gyu-ri was eliminated in the 3rd elimination as she ranked at 25th place.

Starting from September 21, Fromis 9 would be managed under Off The Record Entertainment, a new agency exclusively established for Fromis 9 and South Korean-Japanese girl group, Iz One.

The group has released a special single album titled From.9 on October 10 with the title song, “LOVE BOMB,” which has reached over 10 million views on YouTube. This was the first comeback with all the 9 members after the return of Jang Gyu-ri.

On October 15, 2018, Fromis_9 made their acting debut in a web series, Welcome to Heal Inn, on their official VLive page. However, it was filmed during Gyu-ri’s absence. On February, 8, 2019, a seconds short season in announced for the Winter Season, this time with Gyuri added as a new traveller.

Source: wikipedia