Muv-Luv

A high school student known for his laid-back demeanor and interest in a virtual reality mecha game encounters a sudden change in his routine when he wakes up to find a girl named Meiya in his bed. He has no prior memory of her, but she is later identified as the heir to a major Japanese corporation. Meiya begins living with him and uses her wealth and determination to alter his life. The story is adapted from a visual novel trilogy and includes multiple story arcs.