Quick Answer
No confirmed platforms for Aneki... My Sweet Elder Sister: The Animation right now. Search Crunchyroll, Netflix, and Amazon Prime below to check your region. The show is 4 episodes (~2h watch time).
Where to Watch Aneki... My Sweet Elder Sister: The Animation
We don't have confirmed streaming data for Aneki... My Sweet Elder Sister: The Animation right now, but it's likely available on one of the major platforms below. Hit the search links to check your region.
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About Aneki... My Sweet Elder Sister: The Animation
Takumi just cannot stop fantasizing about Saki-senpai, her voluptuous body just stands out anywhere. One day she talks to him on the train and they become friends. Whenever he can, Takumi stares at her form, always getting a hard-on. The next day he finds out they have the same fetish... and so the story begins. (Source: AniDB)
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Aneki... My Sweet Elder Sister: The Animation legally?
We don't have confirmed platform data for Aneki... My Sweet Elder Sister: The Animation at the moment, but Crunchyroll, Netflix, and Amazon Prime are the most common homes for anime. Use the search links above to check what's available in your area.
Is Aneki... My Sweet Elder Sister: The Animation on Netflix or Crunchyroll?
Can't confirm either right now. Both platforms rotate their catalogs pretty often, so it's worth searching directly on each one.
Is Aneki... My Sweet Elder Sister: The Animation available with an English dub?
Dub availability depends on the platform. Crunchyroll has been expanding their dubbed library a lot recently, and Funimation (now merged into Crunchyroll) historically had the biggest dub catalog. Check each platform's listing for Aneki... My Sweet Elder Sister: The Animation.
Can I watch Aneki... My Sweet Elder Sister: The Animation for free?
Crunchyroll offers a free ad-supported tier for some shows. Most other platforms require a subscription, but many offer free trials for new users. Tubi and Pluto TV occasionally have anime in their free rotation too.