One plot idea could be Kazuma and Yunyun going on an adventure together to find a rare magical item. Along the way, they face various challenges and have to rely on each other's skills. Yunyun could use her magic to solve some puzzles, while Kazuma uses his street - smart tactics.
Kazuma is often portrayed as a bit of a schemer. He's not overly powerful in terms of magic but is very clever. He can come up with quick solutions to problems that rely more on his wits than brute force. In the context of a fanfic with Yunyun, he might be the one to keep Yunyun grounded and out of trouble, or sometimes get her into new and interesting situations.
I'm not entirely sure about the specific plot of 'kazuma and yunyun visual novel' as there could be many different stories with such characters. It might involve their adventures together, perhaps facing various challenges in a fictional world and growing as characters through their experiences.
One great kazuma x yunyun fanfiction could be 'The Adventure Together'. It might focus on their journey through a new and dangerous dungeon, where they have to rely on each other's skills. Kazuma's strategic thinking combined with Yunyun's magic could make for an exciting plot.
The main characters are Kazuma and Yunyun. Kazuma is likely to be a central figure with his own set of traits and abilities. Yunyun also plays a crucial role in the story.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, and there's a good chance you'll find some great kazuma x yunyun fanfiction there. Just use the search function and type in the relevant tags.
A plot could also center around Megumin getting sick and Kazuma taking care of her. Since Megumin is usually so strong - willed and independent, seeing her vulnerable makes Kazuma realize how much he cares for her. He tries his best to get the right medicine and keep her comfortable, and in the process, their feelings for each other start to surface more clearly.
One plot idea could be Kazuma and Bishamon teaming up for a mission that no one else believes they can accomplish. They start off distrusting each other but as they face challenges, they gradually learn to rely on one another's strengths. Another could be a story where Kazuma discovers a long - hidden secret about Bishamon's past that changes their relationship dynamic.
Perhaps they are at a school event. Ayano is part of the decoration committee and Kazuma is helping out. They start to tease each other about who can do the better job. As they work side by side, their hands brush against each other, and they exchange flirty glances. Kazuma might say something like 'You look really cute when you're focused.' and Ayano would giggle in response.
A great aqua and kazuma fanfic often has a good balance of humor and drama. Since their relationship is full of comical banter, that should be present. At the same time, there can be moments of real danger or emotional turmoil, like when they might lose each other in a dangerous quest. Also, the fanfic should expand on the world they live in, adding new elements to the already rich fantasy setting.
I'm not sure about specific 'kazuma and ayano lemon fanfic' stories as they might not be very common or mainstream. However, you could try searching on some popular fanfic websites like Archive of Our Own. Maybe look for tags related to Kazuma and Ayano to find relevant works.