Monetization could be a consideration if it's a commercial site. Commissioning works could be a paid service, with the platform taking a cut. Or it could be a free community with optional paid memberships for creators.
I need to consider the community aspect, since doujinshi is often about fan creations and interactions. Maybe a marketplace where creators can post what they're working on and fans can commission or upvote their interests. Integration with social media or forums could also be part of it.
Possible interpretations: Maybe a feature for a doujinshi platform or app that allows users to request new works (like a wish list) or a community feature where creators can get requests from fans. The user might want an interactive platform where fans can submit requests to creators for specific storylines or elements (like a "kaachan" character), and creators can fulfill them.
Another angle is a recommendation system that suggests popular or trending doujinshi works based on user preferences, with a focus on certain themes like "kaachan" or other keywords. They might want a social feature where users can vote on which requests get prioritized.
So, putting it all together, they might be looking for a feature related to doujinshi content, possibly involving mother characters ("kaachan") and some kind of wish or request ("negai"). The "hot" at the end suggests it's popular or trending.
In summary, the user likely wants a feature that enhances interaction between fans and creators in the doujinshi community, allowing for collaborative or request-based content creation with a focus on trending or popular themes.