Op: opening animation opening song ed: refers to the original meaning of ending song OVA: OVA: ova (original video animation): original animated video. If the TV version and the theater version of animation are divided according to the broadcast channels, OVA is divided according to the distribution channels. TS: TV Special Edition, referred to as TS for short, is a special animation ots: soundtrack, also called soundtrack, which refers to the soundtrack used in movies, as well as some animations and video games.