Maison B

 is a Japanese dance and vocal boy group produced by KEN THE 390 from the program "THE NEXT UP～次は君だよ" on Music Blood. All members were contestants on the audition program Produce 101 Japan Season 2.

All members of Maison B exited Produce 101 Japan Season 2 while being apart of the "B rank" class of trainees. Accordingly, the "B" in the group's name represents a reversal from the "B class", and the group's determination to always "break" the status quo.

They will officially debut with the EP Foundations on February 15, 2023. Their official fan name is "MBius".

Maison B has a J-Urban sub-unit called roomR who perform alongside KEN THE 390 often.

Current Members

 * RICK - Rap
 * LYU - Vocal
 * REIJI - Rap
 * MASATO - Vocal
 * TECO - Vocal
 * SHOYA - Vocal
 * HIKARU - Vocal

EPs

 * 1) [2023.02.15] Foundations

Digital Singles

 * 1) [2022.08.19] Bringing Out
 * 2) [2022.11.18] Masquerade
 * 3) [2023.01.18] Paradise

Trivia

 * Originally, KEN THE 390 planned for Maison B to debut as a 5-member group on "THE NEXT UP～次は君だよ" . The original lineup consisted of RICK, TECO, LYU, SHOYA and REIJI. HIKARU and MASATO were added to the group through the duration of the show after being recommended by SHOYA and REIJI respectively.
 * The official member colors were announced on December 31, 2022.