Talk:FAQ/@comment-186.5.244.121-20150217011214/@comment-88.193.255.102-20150217013309

You cannot buy them with real money. You buy them with coins (often called 'koban' in this wiki) which you get from expeditions and missions. Check out second tab of your background menu. It shows your current total of "unboxed" coins. Clicking the green text box brings you to your inventory of expendables where you can find three types of coin items (small 200coins, medium 400coins, large 700coins). Unbox them by clicking so they will be added to your coin total. All backgrounds this far cost 30000 coins each.