Rosario + vampire
Plot: Tsukune Aono, an average teenager, is unable to get into any local high schools due to his poor grades. However, his parents are happy to have him enroll in a private school called Yokai Academy, which he discovers is a boarding school for monsters. The school teaches monsters how to coexist with humans, including disguising as them, but any real humans on campus are killed. Tsukune becomes friends with a beautiful vampire girl Moka. In a fight, he accidentally removes the rosario around Moka’s neck, and discovers that she turns into a powerful vampire with a completely different personality.
Why I chose this: Rosario + vampire is a very funny anime but it is full of action, romance and tension with a great storyline.