Tsuki no Sango (Moon's Coral) is a short sci-fi novel written by Nasu for Maaya Sakamoto's Full Moon Recital Hall (organized by Saizensen). The event featured Sakamoto reading the short novels in a theater accompanied by animations in the background. The recital of Tsuki no Sango took place on December 21, 2010, and was aired live on Ustream. The background animation was animated by ufotable. There was also a 42-page booklet containing the story with illustrations by Takeuchi and Aikura.
The book, as well as a CD of the recital, was released in October 2011.