Ser Humano (1970)

In the not too-distant future, a 'synthetic' soldier is on the precipice of ending his own existence after living the horrors of an endless war over the dominion of Mars. His hatred towards himself and humanity take an unexpected turn with the arrival of Myrra, a human soldier whose repeated efforts to prevent his suicide, help the Synthetic acquire a purpose, making him understand what it truly means to be human.