I'm not sure specifically what the 'Davis House Boy Boy Story' is. It could be a story about boys in the Davis House, perhaps their adventures, relationships or daily life there.
The 'obey me novel' often involves a story where the protagonist is immersed in a world full of demons. There are various characters with unique personalities and powers. The plot usually includes elements of the protagonist's interactions with these demons, building relationships, and dealing with different challenges and mysteries in this otherworldly setting.
In 'obey me novel', the main characters are the human protagonist and the group of demons. Among the demons, Mammon is known for his greed and his rather comical antics. Leviathan is the otaku - like demon who is into anime and games. There are also other brothers like Satan, Asmodeus, Beelzebub, and Belphegor, all with their own quirks and characteristics that play important roles in the story.
The 'obey me full story' is about a human who gets thrust into the world of demons. You have to navigate through the Devildom, which has its own hierarchy and power dynamics. The demon brothers play significant roles. For example, Lucifer is the strict and powerful eldest brother. As the story progresses, you learn more about their pasts, their relationships with each other, and how the human fits into this complex world of magic, mystery, and demonology.
I'm not sure specifically what this 'big black obey white boy girlfriend story' is as it's not a common well - known story title. It could potentially be about a relationship dynamic where a person described as 'big black' obeys their 'white boy' partner, but without more context it's hard to say for sure.
Since we don't really know the story, it's difficult to say much about the characters. But if we assume based on the title, there's the 'big black' character who may be in a submissive role as the title mentions 'obey'. The 'white boy' is another character, and then there's the 'girlfriend' who could be related to either of them in different ways, like the 'big black' could be the 'girlfriend' of the 'white boy' or there could be some other complex relationship.
A 'brainwash obey me and only me' fanfic could be a very interesting and perhaps a bit dark concept. It might involve a character using some sort of magic or psychological manipulation to make another character obey them solely. For example, in a fantasy setting, a powerful sorcerer could cast a spell on a hero, making the hero forget their previous loyalties and only follow the sorcerer's commands.
The 'Obey Me' manga and its BL version share many similarities. The BL version might emphasize certain romantic elements more, but it still builds on the foundation of the original manga's world and characters. Some fans might notice minor differences, but generally, the essence is preserved.