SCIENCE FICTION

One morning, an older brother wakes up to find that he has turned into a little girl from his younger sister's drugs.

The man known only as Berzerker is half-mortal and half-God, cursed and compelled to violence even at the sacrifice of his sanity. But after wandering the world for centuries, Berzerker may have finally found a refuge working for the U.S. government to fight the battles too violent and too dangerous for anyone else. In exchange, Berzerker will be granted the one thing he desires the truth about his endless blood-soaked existence and how to end it.

After two years of being dormant inside Tsutomu Senkawa, an accidental encounter with their old nemesis violently wakes Birdy up. With Birdy kicking evil's ass once again, the dark secrets of the experiments conducted by the "Agni" corporation are slowly revealed. They seem to be dabbling with human body enhancement, creating what they call "beast men," to combat the alien invasions related to Birdy.(Source: MangaHelpers)