Quick Answer
No confirmed platforms for Oppai Heart: Kanojo wa Kedamono Hatsujouki!? right now. Search Crunchyroll, Netflix, and Amazon Prime below to check your region. The show is 2 episodes (~1h watch time).
Where to Watch Oppai Heart: Kanojo wa Kedamono Hatsujouki!?
No confirmed streams for Oppai Heart: Kanojo wa Kedamono Hatsujouki!? at the moment, but anime licensing changes fast. Check the platforms below — Crunchyroll and Netflix are usually your best bets.
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Anime licensing changes by region. If Oppai Heart: Kanojo wa Kedamono Hatsujouki!?isn't on your usual service, try these.
About Oppai Heart: Kanojo wa Kedamono Hatsujouki!?
Ryuya has an older sister, Miya. He lives a peaceful school life with his friends. But one day, he and his friends accidentally drink a medicine juice. Once you drink it, you'll become sexually sensitive and get excited. The breasts of the girls who drink it will get bigger and they will need to have sex to cool down. Also, to make a vaccine, they will need to get pregnant. Ryuya starts having sex with the girls to cool them down and make a vaccine. (Source: ErogeShop)
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Oppai Heart: Kanojo wa Kedamono Hatsujouki!? legally?
We don't have confirmed platform data for Oppai Heart: Kanojo wa Kedamono Hatsujouki!? 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 Oppai Heart: Kanojo wa Kedamono Hatsujouki!? 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 Oppai Heart: Kanojo wa Kedamono Hatsujouki!? 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 Oppai Heart: Kanojo wa Kedamono Hatsujouki!?.
Can I watch Oppai Heart: Kanojo wa Kedamono Hatsujouki!? 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.