What is the best hentai serie With extreme content and a harem type

There are several hentai series noted for their extreme content and harem themes. However, since these series can contain explicit and potentially controversial material, I recommend exploring these titles with caution and ensuring they align with your personal preferences and comfort levels. Some well-known series in this genre include:

**"Monster Musume"** - While not strictly hentai, it features harem elements and is known for its adult themes involving various monster girls.

**"Eromanga Sensei"** - Although more of a lighthearted rom-com, it has some adult themes and a harem dynamic.

**"Ane Naru Mono"** - This series includes extreme adult content and features a harem setup with a mix of fantasy elements.

**"Bunny Girl Senpai"** - This series has harem aspects and deals with supernatural themes, but it leans more into drama and romance.

**"Nekonote"** - Known for extreme adult content and a harem setup.

Make sure to check user reviews and content warnings before diving into any of these series, as they can vary widely in terms of presentation and thematic material.