Midnight Robot

Boys and girls, it's time to get in the robot!

Fumiko Daidouji has become used to her dad not being in her life, until he suddenly returns home with a gift: a screw lodged into her cranium! He claims it's to protect her from a secret, nameless organization, and not surprisingly, she figures her Dad has a screw loose himself.

However, the organization is very real - and they want Fumiko's screw to summon a giant robot! Dragged against her will into a battle to save the world, Fumiko quickly realizes that her once ordinary life is gone. Now, she faces world destruction, a parallel cosmos, and the midnight robot that connects them all.

(Source: Manga Mavericks)