This is the 15th volume of the "schola" series of music collections with CDs under the general supervision of Ryuichi Sakamoto, which began publication in 2008. This volume, a sequel to volume 12, introduces masterpieces and history of contemporary music from the second half of the 20th century onward. The CDs include masterpieces by Ligeti, Stockhausen, and others, as well as works by Dai Fujikura, representing the era.