Is Mizu no Kotoba hentai?
English title: Aquatic Language
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV Special · 2002 · 1 episodes · PG-13 - Teens 13 or older
Drama, Psychological, Sci-Fi, Suspense
Several people are spending their evening in a cafe. Two gossiping girls, two debating men, a bookworm and a boy, who just broke up with his girlfriend. The cafe's waitress starts a chat with him, persuading him to take a look at certain easel, while other customers begin to notice unusual things. (Source: ANN)
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