I really don't know. There are so many manga out there. Yuki's choice could be anything from a fantasy epic to a slice-of-life story. Maybe you can look for manga-related items around Yuki to get a clue.
The ending of the Vampire Knight manga was still uncertain because the author, Shuliang, had made some statements and news after the manga ended, but the specific details had not been officially confirmed.
According to some known information, the ending of the vampire knight manga might involve some major plot twists and changes in character relationships. For example, the fate of the main characters in the manga, such as Youji, Jiu Lanshu, Zero, and the vampire son of Shu and Jiu Lan, Yaksha, might be affected to some extent.
At present, the specific details and direction of the ending of the vampire knight manga are still changing. We can only patiently wait for the official news and statement.