[1] The band's music has also been featured in the anime series Wotakoi: Love is Hard for Otaku, Mix: Meisei Story, Pretty Boy Detective Club, Delicious in Dungeon, and the anime film I Want to Eat Your Pancreas, My Hero Academia.

[2] The group's name is derived from the Japanese word sumika (すみか, residence), and refers to the desire of its members to consider the band as their "house" or their "room".

[6] Their third mini-album Vital Apartment was released in June 2015 and peaked at number 32 on the Oricon weekly charts.

[7] In 2016, they released the single "Lovers/Dengon Uta" (Lovers/「伝言歌」), the mini-album Answer Parade (アンサーパレード), and the extended play "Sally".

[12] That same year, they released the extended play "Fiction"; the title track was used as the opening theme to the anime television series Wotakoi: Love is Hard for Otaku.