OAHSIS (오아시스),formerly known as SEEART (씨앗),was a pre-debut seven-member girl group under KRAZY Entertainment. They were set to debut in early 2017 under Yama&Hotchicks Entertainment but was delayed. In 2018,Hyedam left and the group signed with KRAZY Entertainment.
Years Active: 2016–2019
KRAZY Entertainment (2018–2019)Yama&Hotchicks Entertainment (2016–2018)