Walwari

On August 1, HIStar Entertainment announced that Merry had left the group to focus on her studies and would be replaced by new member Miri. However, she also left the group in late 2018. In May 2019, the group revealed their new third member Soohyun.

The same month, they released their fifth digital single "Oppa is Cheating" on the 13th. In January 2020, the group disbanded as the members' contracts with the agency ended and they decided to not renew. In May 2020, Mr.

Boombox revealed in an interview with Xports News that the group disbanded as the other members allegedly wanted to quit singing and he signed with a new agency. He also confirmed that there was no discord between the members and that they still supported each other. Following Walwari's disbandment, the members went their separate ways: - Mr.

Boombox made it to #29 place on Mr Trot before getting eliminated. He later signed with KW Entertainment and released his first solo digital single "Drink" on August 23, 2020. - Jyunky returned to being active as a MC and solo singer with the digital single "Our Time" on July 26, 2020.

- Soohyun participated in Trot Contest in November 2020 but was eventually eliminated from the competition in Episode 5, at #46 place. She later re-debuted as a member of MINIMANI on June 2, 2021 with the digital single "Stop" and made her solo debut with the digital single "Chuk & Chak" on March 1, 2023. - Miri and Merry appeared to have left the entertainment industry.