- Title: なんたって18歳!
- Title (romaji): Nantatte 18-sai!
- Format: Renzoku
- Genre: Comedy
- Episodes: 52
- Broadcast network: TBS
- Broadcast period: 1971-Oct-05 to 1972-Sep-26
- Air time: Tuesday 19:00
- Theme song: Nantatte 18-sai! by Okazaki Yuki
A lighthearted comedy revolving around a young woman who takes a job at her father's company.
Aoki Madoka, 18, is the only daughter of the president of a tourism company. Madoka is a free-spirited, naive girl who is not suitable for the upper classes of society. Having grown up without a care in the world, she feels her life is boring and monotonous. As a change of pace, Madoka decides to join her father's company as an apprentice bus tour guide, but hides the fact that she is the President's daughter and goes by the name "Aoyama Haruka".
- Okazaki Yuki as Aoki Madoka
- Music: Kikuchi Shunsuke