Many years ago, vampires who wandered around Japan did whatever they wanted, drank blood from whoever they wanted, etc. There were no rules. Japan was in chaos, and no one did anything. But it wasn't that way forever. So finally, some of the strongest and oldest vampires got together and worked on a plan to create order in the vampire world.

They created twelve different clans; each would own a section of Japan. Twelve of the strongest vampires and their lineage would rule these twelve clans. (Some of the names of the different clans will be named throughout the series.) Each clan had its own council of elders and rules. And the two oldest elders of each clan would also be a part of the council of elders that would rule the whole vampire world. No one was above that council of elders.

The highest council of elders created some rules that every clan had to follow:

1.) No one could drink blood from humans, only animals. (The only exception to this rule is if you want to turn your lover. But, it still needs to be approved by the council of elders and clan leader. There are other exceptions to this rule that you'll learn later.)

2.) No vampire may hunt outside their clan's borders unless approved by the leader of the neighboring clan.

3.) Since children of vampires are born human, they will receive their vampire form when they turn eighteen. (This partly goes back to rule one. If a vampire's child has a lover, and the lover is approved of, then the lover may be turned as well. However, only the child of a vampire may turn them.)

Ira Miricano and Alex Wartina are children of vampires. Ira is the daughter of the Leader of the Miricano clan, Queen Saria Miricano. Alex is the son of Lord Wartina, an advisor of the queen, and also one of her closest friends. When Ira and Alex were babies, Lord Wartina and Queen Saria made a deal to arrange for their kids to marry each other at age 18, after graduation.

The two grew up together and soon fell in love at age fourteen. Then, right before their first year of high school, they told their parents about their relationship at age fifteen. In return, their parents told them about the arranged marriage. The two teen's eyes light up in happiness. The news was released among the clan members, and a large party was thrown to celebrate. Fast forward to high school, Ira and Alex attend Karasuno High, where Ira becomes friends with the volleyball team. She has mentioned her relationship with Alex but never says anything about her arranged marriage to the boy. They agreed to keep that a secret for now.

The story continues like in cannon from there. Karasuno goes to nationals. And the team even exchanges numbers with some people from other teams, such as Osamu Miya, Atsumu Miya, and Suna Rintaro from Inarizaki or Sakusa Kyoomi from Itachiyama. In addition, they all created a group chat to stay in contact after high school. This place in the time right after nationals. (Ships are the same as the Haikyuu Yandere AU)