I Got Summoned to Another World As a Beautiful Soldier

Hajime Satoru, second heir of the Satoru Clan and an infamous killer in the criminal world has just finished a year of normal high school in the United States. All was going well until he died a pitiful end. Unbeknownst to him, his death was not the end of his hectic life. He was summoned to another world's warring country... as a 16-year-old girl?!