One option is to search on dedicated manga stores' websites. Some well-known ones are RightStufAnime or Book Depository. They might have it in stock or be able to order it for you. Also, check out online marketplaces like Amazon or eBay, but make sure to look for verified sellers.
The heart of manga could be in the unique plotlines that keep you engaged or the relatable characters you root for. It can be in the way the author tells the story and makes you feel part of it.
To seduce a vampire in manga, you could try being mysterious and alluring. Maybe have a unique style or personality that catches their attention. Also, showing bravery in the face of danger could make you stand out to them.
The ending of the Vampire Knight was more complicated because it had changed and deepened many times between the manga and the novel. Here are some possible endings:
At the end of the manga, Yuki became the vampire hunter D and Zero became the knight who guarded her. In the battle with the vampires, Jiu Lanshu and the Pivot Party finally defeated the vampires and finally got together with Youji. However, due to the disappearance of Vampire Hunter D, Zero had no choice but to continue searching for other Vampire Hunters to protect humans.
At the end of the novel, Zero became the new vampire hunter and continued to protect humans. In the battle with the vampires, Zero and Youji finally got together and Jiu Lanshu became Zero's ally again. However, in the novel, the fight between the Central Party and the vampires did not end completely. New threats continued to emerge.
Different versions may have different endings, but in general, the vampire knight is a work of depth and complexity. Its ending may make people feel regretful or gratified.