One great 'hikigaya x yukinoshita fanfic' is 'A Different Perspective'. It delves deep into their relationship, showing how their personalities interact in new and interesting ways outside of the original story's context.
Well, there's 'Hikigaya's Shadow Realm'. This fanfiction takes the darker aspects of Hikigaya's character and builds a whole new world around it. It shows how his personality could be even more extreme in certain situations. It's quite fascinating to see how the author explores his psyche in this different setting.
One common theme is isolation. Hikigaya's already somewhat of an isolated character, and in dark fanfictions, this is often exaggerated. Another theme is internal struggle. His complex mind and the battle between his different thoughts are explored more deeply.
One popular 'cote light novel' is 'Classroom of the Elite'. It has an interesting premise where students are in a highly competitive school environment. The characters are well - developed, and the story often involves complex social dynamics and power plays among the students.
You can start by finding a reliable source to get the novel. Then, set aside dedicated time each day to read and focus on the story without distractions.
The writing style matters a great deal. A fanfic that uses vivid language to describe their emotions and interactions is more engaging. For instance, when describing the moments of their growing closeness, detailed descriptions of their body language, the looks in their eyes, and the words they exchange can make the story really come alive.
Growth is also a major theme. They grow both individually and as a pair. For example, Hikigaya might become more open - minded and Kaori might become more understanding. Love is, of course, a prevalent theme too. The development of romantic feelings between them is often explored in these fanfics.
You can often find 'cote light novels' in local bookstores. Some big chain bookstores usually have a section dedicated to light novels, and they might carry the 'cote' ones.