Their label Brand New Music told news outlets, "As One will be halting their promotions after 18 years with their upcoming single, bringing the beautiful memories they've made in their careers to a close for the time being in order to focus on their personal lives. Their new single will contain an honest message to their fans about their time together."
As One debuted in 1999 with "Day By Day", producing numerous hits over the years. Member Krystal revealed earlier in May that her family - her, her husband, and two sons - planned on immigrating to the United States.
The duo's final single for a while will be released this June 5 at noon KST.