Heartwork: Love Guns(2003)

Heartwork: Love Guns is a series that follows Yuu Asakura, a friendly young man whose life takes a dark turn when he receives an order to kill someone. Initially terrified by the assignment, Yuu undergoes a shocking transformation the moment he holds a gun, discovering a dangerous new side of himself. What begins as a single act of violence spirals into a sinful existence as he's drawn deeper into a world of crime and moral compromise. The series explores how one fateful moment can completely reshape a person's identity and set them on an irreversible path.