K-pop superband BTS member Suga will debut his official solo album `D-Day` on April 21 under a stage name for his previous individual projects, Agust D, his agency BigHit Music said Monday.

`D-Day` will mark the final installment of the `Agust D` trilogy, which began with his mix tapes `Agust D` and `D-2`, reports Yonhap.