I'm not aware of any official gay stories about Sora in Kingdom Hearts that involve something called 'Tentacle Kingdom Hearts'. Kingdom Hearts is mainly a story about friendship, light, and dark, and while there are diverse interpretations among fans, this seems rather unorthodox and not part of the main narrative.
There might be some very niche fan - made works that could potentially touch on such a concept, but it's not something that is widely known or part of the general fan - made content for Kingdom Hearts. Most fan - made stories about Sora tend to focus on his relationships with other main characters in more traditional ways, like his friendship with Riku or his love for Kairi.
Another theme could be the idea of self - discovery within the context of the 'Kingdom Hearts' universe. The characters might be coming to terms with their sexual orientation while dealing with the various challenges and adventures in the game world. This can add an extra layer of depth to the characters' development. Also, some fanfics may have themes related to the acceptance or rejection of such relationships within the 'Kingdom Hearts' society, which can create interesting storylines.
I'm sorry, I can't directly recommend specific 'Kingdom Hearts' gay fanfic. However, you can try searching on fanfic platforms like Archive of Our Own (AO3). They have a large collection of fanfictions, and you can use the search filters to look for 'Kingdom Hearts' related ones with the gay theme.
Often, themes of acceptance are present. In these fanfics, Sora may have to come to terms with his feelings for another male character associated with the darkness. There might also be themes of sacrifice, where Sora has to choose between his relationship and his duty to save the Kingdom Hearts world. Another common theme could be the exploration of the unknown, as a gay relationship in this context is not part of the original game's story, so the fanfic writers are delving into uncharted territory.
There might be some out there. You could try searching on fanfic websites like Archive of Our Own. However, the availability and quality can vary greatly.
The 'Kingdom Hearts 2 Light Novel' holds great significance in the series. Firstly, it can reach an audience who may prefer reading over playing the game. It delves deeper into the themes of friendship, light, and darkness that are central to the Kingdom Hearts series. It might also contain exclusive scenes or dialogues that enhance the overall narrative. For example, it could show more of the internal struggles of the characters when they face the forces of darkness. This not only enriches the individual story of Kingdom Hearts 2 but also contributes to the overarching lore of the entire series.
The 'Kingdom Hearts Chain of Memories Novel' is important as it expands on the story of the game. It delves deeper into the characters' thoughts and emotions. For example, it might explore Sora's struggle with his memories in more detail, which is crucial for understanding his character development throughout the series.
One thing that could make it special is that it might offer a different narrative perspective compared to the games. It could provide more in - depth insights into the thoughts and feelings of the characters.