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.

The trilogy's story initially presents itself as a light-hearted romantic comedy (Extra), but changes into an alternate timeline coming-of-age story (Unlimited), and finally evolves into an alien invasion war epic (Alternative).