A character in Kamitsubaki City Under Construction. RIM plays the role of this girl.
Haru Asanushi
A character in Kamitsubaki City Under Construction. Harusaruhi plays the role of this girl.
Sekai Yorukawa
A character in Kamitsubaki City Under Construction. Isekaijoucho plays the role of this girl.
Koko Rinne
A character in Kamitsubaki City Under Construction. KOKO plays the role of this girl.
Kamitsubaki City Reconstruction Division
A mysterious entity of Kamitsubaki City Under Construction. The management organization's purpose is to restore the city of Kamitsubaki.
Memoirs of an Observer
A valuable memoir delivered by observers who have wandered into Kamitsubaki City. It illustrates daily life in Kamitsubaki City. It is sent periodically only to those who have joined the Unidentified Girl Observation Club (Mikakunin Shojo Kansokubu). On rare occasions, the letters may be illegible, as if someone is interfering.
3.5D
A KAMITSUBAKI STUDIO flagship space in Spain-zaka, Shibuya, open for only a year starting from November 2019. Beginning with the KAF Exhibition, various exhibitions and events were held there. It closed its doors in November 2020 with the KAF Exhibition 2.
