This is the original series of the TV anime 'Chance! Triangle Session' which was aired from June thru August this year. This Box set consists of the contents from 3 audio drama CDs 'Stage 1-3', and a CD 'All Song The Best' containing 10 original songs. All four CDs have been very difficult to find lately. Initial pressing special feature is an artist card(s) of the three main voice actors, Mayumi Iizuka, Atsuko Enomoto, and Maria Yamamoto.