RD-2447 mizuki yui

In the age of 2500, when the world collapsed, demons from another world were mechanized to massacre humans. Many half-human and half-machine were made in the base on the earth to deal with the enemy. Later, a red half-human machine girl appeared who was very powerful in combat. Until her commander was assassinated by the enemy, she felt very sad. For her sake, the commander came to take revenge