The Systems Force: Terra Indomitus.

After a helicopter crash, Navy SEALs Captain Avery Gallahan woke up to find out that he was in a completely different reality than his own with no idea of how he got here or where his team was. Now he has to survive the harsh world and the villain and hero in it. But first, he has to figure out what happened and why this mysterious Doctor is so interested in him. (Crackish)(Lemon)(Some Harem Element and if you don't like it too bad)