The soundtrack was awesome. The animation was perfect and characer designes were amazing too. Especially Yuliy and Mikhail is drew so detailed and perfect. There wasn't a problem with the story. A classic vampire&reveng anime but it was good. Character development was bad. Just it did annoy a little. But its an 12 episode anime so there wasn't enough time. And the relationship between Yuliy and his brother Mikhail's relationship development was really good. Even though it was a good anime. If you love genres like vampire and revenge, this anime is the one for you.