Is Fuyu no Sonata hentai?
English title: Winter Sonata
No
Rated PG-13 (Teens 13 or older) on MyAnimeList and not tagged as Hentai.

TV · 2009 · 26 episodes · PG-13 - Teens 13 or older
Drama, Romance
Based on the Korean drama of the same name, Yoo Jin falls in love with Joon Sang as a young girl. After losing him in an accident, she decides to marry her childhood friend. However, Yoo Jin meets someone looking exactly like her lost love, putting her in a bind.
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