On March 15, 2018 JBJ confirmed that they would be releasing their last single on April 17, and also announced plans to hold a domestic concert and fanmeeting before the official disbandment date of April 30. On March 19, JBJ announced details on the final solo concert, titled JBJ Really Desirable Concert [Epilogue], which would take place from April 21 to 22, 2018 as an extension of their first concert Really Desirable Concert in February. The two-day concert will be held in SK Olympic Handball Gymnasium.JBJ released their final album New Moon on April 17. The album included three new tracks in addition to all the songs from EP Fantasy and True Colors.On April 22, JBJ officially concluded their final concert JBJ Really Desirable Concert [Epilogue] as their last performance.
The group officially disbanded on April 30, 2018, due to members contracts expiration with Fave Entertainment.