Maison book girl

 is a Japanese idol group formed in 2014 by former BiS member Koshouji Megumi and produced by Sakurai Kenta. Their name is sometimes abbreviated as Bukuga (ブクガ) or MBG.

They had their United Kingdom debut in 2017 with the label Read The Air Records. On May 2018, they had their first United Kingdom tour with 4 performances.

On May 30, 2021 after a one-man live the group disbanded. A live Blu-ray release of their last live will be released on August 18, 2021.

Current Members

 * Koshouji Megumi (コショージメグミ)
 * Yagawa Aoi (矢川葵)
 * Inoue Yui (井上唯)
 * Wada Rin (和田輪) (Joined March 27, 2015)

Former Members

 * Soumoto Kaori (宗本花音里) (Left March 27, 2015)

Albums

 * 1) [2015.09.23] bath room
 * 2) [2017.04.05] image
 * 3) [2018.11.21] yume
 * 4) [2019.12.18] Umi to Uchuu no Kodomotachi (海と宇宙の子供たち; Children of The Sea and The Universe)

Best Albums

 * 1) [2020.06.24] Fiction

Singles

 * 1) [2015.03.14] white (Indies)
 * 2) [2015.03.14] black (Indies)
 * 3) [2016.11.30] river (cloudy irony)
 * 4) [2017.06.19] 412
 * 5) [2017.12.13] cotoeri
 * 6) [2018.05.18] karma // bath room (UK Version)
 * 7) [2018.06.20] elude
 * 8) [2019.07.31] umbla

EP

 * 1) [2016.03.30] summer continue (Indies)
 * 2) [2019.04.03] SOUP

Trivia

 * Their singles frequently have a second B-side with poetry reading. The poetry is usually written by Koshouji Megumi, who has already released a poetry book
 * From July to November 2014, the temporary name of the group was Book House Girl