I recommend " My Two-Dimensional Goddess Wife ". This is a light novel, a derivative doujinshi novel. The female lead is Hiroo Takasaka, and her sister is Yukino Yukino. There are many other anime goddesses in this novel. The OP will definitely like them. I hope you like my recommendation.š
Sure, Oregairu has a manga. The manga expands on the story and characters from the original source material. It offers a different perspective and more detailed plotlines.
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 try fanfiction websites like Archive of Our Own (AO3). It has a large collection of various fanfics, including 'hikigaya x harem' ones. Just use the search bar and type in relevant keywords to find what you're looking for.
One popular 'hikigaya x harem fanfic' could be 'The Hikigaya's Harem Adventures'. It often features interesting character interactions and unique plotlines that revolve around Hikigaya and his relationships within the harem. Another one might be 'Hikigaya in the Harem World' which delves into how he copes with multiple characters vying for his attention in a fictional world.
Yukino's character in " Spring Things " was an independent, strong, and ambitious female character. She was a diligent student in school and had a high pursuit of academics and knowledge. At the same time, she was also a person with principles and a bottom line. She was very firm on matters of principle and morality.
In terms of interpersonal relationships, Yukino's personality was more introverted and she was not good at expressing her feelings, but she also had strong emotional needs deep in her heart. She had high standards for her appearance and figure and often boasted and emphasized her strengths to attract others 'attention. She also had a strong sense of self-esteem and self-protection. She would not easily let others approach or hurt her.
Snow was an independent female character with a complicated heart. She also had a strong sense of morality and principles. She was a very important character in Spring Things.