Muv-Luv is a Japanese visual novel developed by âge and originally released as an adult game for Windows on February 28, 2003. Consisting of two parts, Muv-Luv Extra and Muv-Luv Unlimited, the gameplay in Muv-Luv follows a linear plot line, which offers pre-determined scenarios and courses of interaction, and focuses on the differing scenarios of the female main characters. Muv-Luv was followed by a sequel, Muv-Luv Alternative, which was released for Windows on April 24, 2006, and follows the storyline of Muv-Luv Unlimited.

In science fiction, mecha or mechs are giant robots or machines typically depicted as piloted and as humanoid walking vehicles. The term was first used in Japanese after shortening the English loanword 'mechanism' or 'mechanical' , but the meaning in Japanese is more inclusive, and 'robot' or 'giant robot' is the narrower term.