The plot involves the group's attempts to complete quests in the world they've been transported to. They have to deal with incompetent local authorities, strange magical creatures, and the general absurdity of the world. For example, Aqua might use her water-based magic in unexpected and not always helpful ways, while Megumin loves to use her extremely powerful but one - use - only explosion magic, often causing more trouble than it solves. Darkness, on the other hand, has her own set of quirks related to her role as a Crusader. Overall, it's a story full of humor, action, and the unexpected.
One of the main themes is adventure. The characters are constantly on quests and facing various challenges in a strange and magical world. Another theme is friendship. The group of misfits in the story, like Kazuma, Aqua, Megumin and Darkness, form a unique bond through their shared experiences.
There's Kazuma, who is the central figure trying to navigate this strange new world with his rather odd group of companions. Aqua, the goddess, brings a certain level of chaos with her scatterbrained nature and water - based magic. Megumin, the explosion - loving mage, adds a lot of action and destruction (albeit in a limited capacity each day) to the story. And Darkness, the Crusader with her unique personality quirks, provides an interesting dynamic to the group. Their different personalities and abilities clash and combine to drive the story forward in the Konosuba Fantastic Days light novel.
Kazuma is also a very interesting character. He's the reluctant hero. He was just an ordinary NEET who got transported to this strange world. He has to use his wits and the strange abilities of his party members to survive. His snarky comments and his growth from a lazy person to a somewhat more responsible adventurer are really engaging aspects of his character.
I'm not entirely sure, but it's very likely. TvTropes is a comprehensive database for all kinds of fictional works. Given Konosuba's popularity, especially in the anime and light novel world, it would make sense for there to be a section about its visual novel on TvTropes. You could check by searching for 'Konosuba visual novel' on the TvTropes website.