Is Trapp Ikka Monogatari hentai?
English title: The Trapp Family Story
No
Rated G (All Ages) on MyAnimeList and not tagged as Hentai.

TV · 1991 · 40 episodes · G - All Ages
Childcare, Drama, Historical, Music, Romance
Based on the same story that produced the classic musical 'The Sound of Music', this is the story of Maria, who leaves her life in a convent to take up the responsibility of taking care of Captain Trapp's children. (Source: ANN)
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