Original video animation - Wikipedia
https://en.wikipedia.org/wiki/Original_video_animation
WebOriginal video animation (Japanese: オリジナル・ビデオ・アニメーション, Hepburn: orijinaru bideo animēshon), abbreviated as OVA and sometimes as OAV (original animation video), are Japanese animated films and series made specially for release in home video formats without prior showings on television or in theaters, though the ...
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