Gundam EXA  

In an undisclosed time period, humanity has developed advanced technology. Despite this progress, the human population is declining and appears to be heading towards extinction. The main characters are Leo Alloy, Sthesia Awar, and their Haro, who reside on a Jupiter base known as "Jupiter X". They utilize "General Answer" (GA), which holds an extensive database of information regarding the alternate histories of humanity. Leo embarks on a mission to Earth's alternate timelines in search of data that could potentially provide insights into the evolution of mankind.