What is the nature of the 'hentai manga class president' content?

This kind of manga often involves explicit and adult-oriented content centered around the class president in a vanilla style.

It usually involves romantic or intense relationships centered around a class president character. These stories can have various themes and plotlines.

The main plot usually involves the adventures and challenges faced by the class president in a somewhat unconventional and adult-oriented setting.

Class reunion hentai manga often explores themes of nostalgia and forbidden desires within the context of a class reunion. The content can be quite graphic and may not be suitable for all audiences. However, it caters to a specific niche audience with particular interests.

It's likely a manga with themes related to some form of adult or inappropriate content involving paintbrushes. But be careful, such manga might not be suitable for everyone.

I have no idea. That seems like a really odd and specific combination and it's hard to tell what the connection could be.