Gundam EXA

In an unspecified future, humanity possesses advanced technology but faces a declining population and potential extinction. Leos Alloy and Sthesia Awar, along with their Haro, operate from a base on Jupiter known as "Jupiter X." They utilize a system called "General Answer," which holds extensive data on human alternate histories. Leos explores different Earths across these timelines to gather information that could provide insight into humanity's future development.