One idea could be Sebastian protecting Ciel from other alphas who see Ciel as a desirable omega. Another could be Ciel struggling with his omega instincts while trying to maintain his role as the head of the Phantomhive family. Maybe Sebastian and Ciel could go on a journey together where they have to rely on each other and their bond deepens as a result.
One common theme is the power dynamic. The alpha is often seen as the dominant figure, while the omega is more submissive, and this creates an interesting relationship. Another theme is love against all odds. They might face opposition from their society or families because of their alpha - omega status.
The alpha and omega concept in fanfic often refers to characters or forces that represent the beginning and the end, the ultimate or the most powerful.
The relationship can start with Sebastian being protective of Ciel. Since Ciel is an omega, he is in a more vulnerable position in this omega - alpha dynamic. Sebastian can start to show small signs of affection, like making sure Ciel eats well or is warm. This can gradually build into deeper feelings as they face challenges together.
One common theme could be the relationship dynamics between an omega and an alpha. There might be themes of protection, where the alpha xiumin protects the omega chen. Another could be about the challenges they face in a world where their omega - alpha statuses matter.
Well, one popular alpha x omega yaoi fanfic could be 'Moonlit Bonds'. It beautifully portrays the relationship between the alpha and omega characters. The story is set in a fictional world where their bond is tested by various challenges. Another one is 'Hidden Desires' which delves deep into the emotions of the characters and how their alpha - omega dynamic affects their interactions.
The alpha - omega dynamic affects their relationship in multiple ways. Firstly, Harry's alpha status makes him territorial. He might get jealous easily when other alphas are around Draco. Draco, as an omega, has a more nurturing side which can soothe Harry's more aggressive alpha tendencies. However, the traditional expectations of the alpha - omega relationship in the fanfiction world can put pressure on them. For example, society might expect Draco to be submissive all the time, but he may want to assert himself. So they constantly have to work through these issues to make their relationship work.
Finding specific omega chen x alpha xiumin fanfic depends on the popularity of this pairing in the fandom. You could also check fanfic forums dedicated to the group that chen and xiumin belong to. Fans there often share and discuss their favorite fanfictions. Additionally, some fanfic authors might post their works on their personal blogs or Tumblr pages, so it's worth exploring those platforms too.