Muv-Luv Alternative Season 2

With the coup d'état put down, Takeru Shirogane and his fellow cadets are graduated to full surface pilots, ready to take on the alien BETA. But Takeru has a bigger plan in mind: using his timeline-hopping ability to help XO Yuuko Kouzuki complete the 00 Unit and thus implement Alternative IV before it's canceled, as it was in his previous timeline loop.

Synopsis from Anime News Network