Umi to Uchuu no Kodomotachi

 is the fourth album by Maison book girl. It was released on December 18, 2019.

Album Information
Limited Edition A includes Blu-ray content from their "Solitude HOTEL" performance along with an exclusive studio live performance.

Limited Edition B contains "Solitude HOTEL B1 ▶ ∞F" footage, along with two books, exclusive pictures and album commentary.
 * Catalog Number: PCCA-4874 (Limited Edition A), PCCA-4875 (Limited Edition B), PCCA-4876 (Regular Edition), BRCA-106 (Amazon Exclusive)

CD

 * 1) Kaze no Ashi (風の脚)
 * 2) Umibe ni te (海辺にて)
 * 3) Yamishoku no Asa (闇色の朝)
 * 4) Kanashimi no Kodomotachi (悲しみの子供たち)
 * 5) No Wonderland (ノーワンダーランド)
 * 6) Silhouette (シルエット)
 * 7) LandmarK
 * 8) Kujira Koujou (鯨工場)
 * 9) Laundry (ランドリー)
 * 10) Nagai Yoru ga Agete (長い夜が明けて)
 * 11) Omoide-kun (思い出くん)
 * 12) Yamishoku no Asa (Instrumental) (Amazon Exclusive)

Featured Members

 * Koshouji Megumi
 * Yagawa Aoi
 * Inoue Yui
 * Wada Rin