The Anatomy of Otaku Media: Understanding the Niche Entertainment Ecosystem
This figure is a staple in the "nukige" genre, which refers to games or media primarily focused on titillation and erotic scenes. For example, the visual novel "Onee-chan no Yuuwaku" has been described as "a very horny nukige with an awesome, busty, teasing Onee-chan who will ensure you're well taken care of".
The reference to "cloudy white" (hakudaku) is a universal visual signifier in adult media, focusing heavily on specific physical acts and climaxes.