Home/Discover/Yakusoku (ONA)Yakusoku (ONA)約束Yakusoku (ONA)2013 · ONA · 1 episodes▶ Watch episode 1+ My list OverviewEpisodesThe storyONAA short animation by Tekken.MusicDramaEpisodesChoose your next chapterEpisode titles follow your spoiler shield.Edit watched progress1Episode 16 min▶