High School (Hangul: 여고생, Also known as: HighSchool, HIGHSCHOOL) is a four-member South Korean girl group under Richworld Entertainment. The members are: HaeBin (혜빈), J (제이), SoEun (소은) and YeBin (예빈). They officially debuted on April 30, 2019. Pre-Debut On October 30, 2017, Richworld Entertainment announced that producer and singer Rich would be producing a four-member girl group called High School, which will debut in the second half of 2018. The girls pre-debut concept had them wearing masks to conceal their real identities because Rich wanted people to focus on their talents instead of their visuals. In late 2018, members Dami (다미)and Yiseul (이슬)) left the group and were replaced by Yebin and Y. Due to the member changes, it was decided that the group's debut would be postponed until March 2019. Unfortunately, afterwards, the choice to lengthen the postponement until April 2019 was made. There was plans that for the group to release two pre-release singles "High Class" on March 20, 2019 and "Baby You're Mine" in April. On March 20, 2019, the group ended up releasing one pre-debut and pre-release single titled "High Class". Debut: 2019 High School officially debuted on April 30, 2019 with the single Baby You're Mine. The single contained the titluar track "Baby You're Mine" (베유마). This track was co-written by member Haebin. The single also had B-side track "High Class". First Mini Album: 2020 On February 18, 2020 the group released their first mini album called Love, Pure, Passion. The title track was "Love, Pure, Passion (LPP)" with the B-side being "Timing" (타이밍). Other songs on the album was the previously released "Baby You're Mine" (베유마) and "High Class".