One-Punch Man is useful for English practice if you can already follow natural conversations. Some scenes use denser language, so learners may need to pay close attention to word choice and phrasing. Also, animated scenes often make the context easier to follow through visual clues. At an average of around 98 words per minute, the dialogue is generally manageable, though some exchanges require more attention. Some parts may require more focus, but the main story remains easy to follow. One-Punch Man works best for learners around B2/C1 who are ready for more demanding vocabulary.