Manga Like Muv-Luv

Light novel adaptation of the visual novel trilogy, covering Muv-Luv Extra, Unlimited and Alternative. Shirogane Takeru is a typical high school student with a lazy attitude and a love for the virtual reality mecha battle game Valgern-on. Even though he didn't really want it, he's popular in school mainly due to his daily fights with his childhood friend (Sumika) attracting too much attention. His life takes an unexpected turn when he finds a girl named Meiya he doesn't remember ever meeting in his bed one morning. She's later revealed to be the heiress of one of the biggest corporations in Japan. She immediately moves to his house and starts changing his life for the good with her one-track-mind and unlimited resources... (Source: VNDB)