Synopsis

A girl is a 300-year-old monster. She travels for 4 years to find a boy who will help her fulfill her wish to be human.

A boy id just an ordinary 17-year-old teener who works in a gay bar. He finds a filthy girl bringing his estranged dad's skull.

A gigantic flying monster attacks the city. It turns out to be the pet of the girl. She chases it, and the boy follows her.

The bird nearly kills the girl, but the boy saves her, and in the process got himself killed.

The girl is aghast, and her second persona turns the boy into a immortal to save him.

All's well that ends well. Boy decides to help girl. Girl is overjoyed. Went on a journey together. Fell in love with each other.

He he. Of course, it's not THAT simple. You have to read the manga for yourself.

Maybe one of these days, I'll post a better synopsis. For the meantime, enjoy my in-depth summary written with movingly beautiful language that can make even Shakespeare green with envy. ^_^