Diabolik Lovers Crossover Black Butler Fanfiction: What are some interesting plot ideas?

One idea could be a crossover with Vampire Knight. The Diabolik Lovers vampires could interact with the ones from Vampire Knight in a school setting. There could be rivalries over territory or a common prey. Another idea is a crossover with Black Butler. Sebastian could be hired to deal with the unruly Diabolik Lovers vampires, creating a lot of tense and interesting scenarios. A third idea might be a crossover with Ouran High School Host Club. The vampires could accidentally end up at the host club and chaos would ensue as they interact with the flamboyant hosts.

One idea could be that Elsa's ice powers attract the attention of the vampires in Diabolik Lovers. Maybe they see her as a unique being and try to either control her powers or use her for their own dark purposes. For example, one of the vampire brothers might think that her ice could be used to create a new kind of weapon or to enhance their lair's defenses.

A friendship - centered fanfiction would be cool. Maybe a new character befriends the vampires not out of fear but because they see the good in them. This character could slowly break down the walls the vampires have built around themselves and change their relationships with each other.

A cool plot for a 'Black Butler' crossover fanfiction might be a crossover with 'Kuroshitsuji' and 'Death Note'. Light Yagami could somehow cross paths with Ciel and Sebastian. Light might see Ciel as a means to an end in his grand scheme of creating a new world order, while Sebastian would be intrigued by Light's Death Note and the power it holds. It would be a battle of wits between them, with Ciel caught in the middle, trying to figure out how to use this situation to his advantage.

One idea could be a crossover where Naruto characters end up in the Diabolik Lovers universe. Maybe Naruto's positive attitude starts to influence the dark and brooding vampires in Diabolik Lovers, leading to some unexpected friendships. Another plot could be a Diabolik Lovers character being sent to the Naruto world and having to adapt to a completely different environment with ninjas and chakra.

Well, Ciel Phantomhive and Shu from Diabolik Lovers might form an alliance in a strange way. Ciel is always looking for ways to gain an edge in his battles and investigations, and Shu, despite his lazy appearance, has his own hidden strengths. Shu might be interested in Ciel's resources and power, while Ciel could see Shu as an unpredictable but potentially valuable asset. Maybe they form an alliance out of mutual need and a bit of curiosity about each other's worlds.

Maybe the Black Butler characters are sent to the Hetalia world. Sebastian could be intrigued by the different cultures and politics of the countries. He might use his charm and skills to manipulate some of the smaller countries for his own or Ciel's gain. Grell could go wild with excitement over all the new 'pretties' he could potentially reap in this new world filled with so many different characters. And Ciel would be constantly trying to figure out how to get back to his own world while also dealing with the strange international relations in Hetalia.

One idea could be that Ciel from Black Butler somehow gets transported to the world of Inuyasha. He could end up teaming up with Inuyasha to fight a common enemy, like a powerful demon that threatens both their worlds. Ciel's intelligence and strategic mind would complement Inuyasha's brute strength.

A great plot idea is that the reapers from Black Butler somehow cross over to Gotham. They start interfering with the natural order there, which catches the attention of the Batfam. The Batfam initially mistakes them for some new, super - powered villains. Meanwhile, Sebastian is following the reapers to bring them back to their own realm and gets tangled up with the Batfam in the process. And what if Ciel was sent to Gotham on a mission by the Queen and he has to work with the Batfam to complete it.

A fun plot could be a cross - over where the Trickster from Supernatural ends up in the Black Butler world. He starts causing chaos by playing tricks on the characters. Sebastian tries to outwit him while also protecting Ciel. Meanwhile, the Trickster's antics might expose some secrets within the Phantomhive household that were better left buried.