Muv-Luv Alternative

In this sequel to Muv-Luv, Takeru wakes up three years after the beginning of Unlimited to find himself back in his room. Although he first thinks that the events of Muv-Luv Unlimited were a dream, he soon feels that something is wrong, and leaves the house to find that he has been sent back in time to the beginning of the events in Unlimited. Unwilling to accept the events at the end of Unlimited, he decides to help professor Kouzuki save the earth and mankind. (wikipedia.org).