Known in Japan as "Ao no Kanata no Four Rhythm" officially abbreviated as Aokana and translated as Four Rhythm Across the Blue. Base on Japanses visual novel developed by spirited and game pc. Opening Theme "Contrail: Kiseki" song by "Kawada Mami". Ending Theme "A-gain" Song by "Ray" and Ending Theme last episode "Kimi to Ita Kisetsu" Song by "Ray"