Purple Eyes in the Dark (manga)

I have these Japanese books of Purple Eyes in the Dark complete but I dont read any Japanese languages. I am the collection of Japanese manga over 3,000 graphic novels books. (all Japanese). 

Rinko Ozaki has a strange birthmark on her arm. As it starts to darken, strange things begin happening to her - she is obsessed by the smell of blood, and her eyes begin to glow purple in the dark. When she is attacked in the street at night, however, something more terrifying happens as she transforms into a monstrous beast and rips her attackers apart. The manga follows Rinko learning the truth about who she is, her romance with childhood friend Shinya, and the interests of her biology teacher, who is extremely curious about the birthmark...