One of my favorite animes

Vampire knight (season 1) + Vampire Knight guilty (season 2)

Yuki's earliest memory is of a stormy
 night in winter, wherein she was 
attacked by a vampire... And then 
rescued by another. Now 10 years 
later, Yuki Cross, the adopted daughter
of the headmaster of Cross 
Academy, has grown up and 
become a guardian of the vampire
 race, protecting her savior, Kaname, 
from discovery as he leads a group 
of vampires at the elite boarding school.

But also at her side is Zero Kiryu, 

a childhood friend who’s hatred for 

the creatures that destroyed 

everything he held dear, is now

determined never to trust them. 

This coexisting arrangement seems

all well and good, but have the

vampires truly renounced their 

murderous ways, or is there a 

darker truth behind their actions.                                                                                            

Is Kaname's infatuation with Yuki

 the beginning of a something in her

 forgotten past that draws him to her.

 Because in this world of secrets, 

nothing is as it seems. And the price 

of misplaced trust may even be worse

 than death.