CB is the first part of a trilogy called 'Trinofi', the other works are 'Catulli Carmina' (on poems by Catullus) and the 'Triumph of Aphrodite' (based on verses by Catullus, Sappho and Euripides). I would caution people to listen to these works carefully before buying to avoid disappointment. They are interesting works but don't have the raw appeal of Carmina Burana.
Carmina Burana (1936), Catulli carmina (1943) and Trionfo di Afrodite (1953) form the parts of a triptych, meant to be performed as "total stage works" where movement, dance, singing, music, speaking and other stage crafts were all combined to produce an overwhelming or thought provoking effect. Lyric latin poems of the middle ages and poems from Roman and Grecian antiquity, mixed with pieces in the vernacular (middle-high German, ancient Provencal and Italian) form the basis of these three works, rich in their diversity, under the title Trionfi since they were first performed in their entirety in Milano's La Scala. Originally Orff never conceived the works as an integral cycle.
The Trionfi is about love in different places, times and circumstances. If you can understand Latin and are easily offended, then care should be taken listening to Catulli Carmina as the lyrics are quite explicit. Most record liner notes just summarise the first section with "The girls and boys get more and more excited…".
Orff also wrote operas.