black operation
非合法作戦
black reconnaissance
https://source.unsplash.com/featured/?black-operation#.png
/suto3/google.iconblack operation
/suto3/Google画像検索.iconblack operation
/suto3/Google定義検索.icon black operation
/suto3/wikipedia.iconblack operation
/suto3/weblio.icon black operation
/suto3/kotobank.icon black operation
/suto3/jisho.icon black operation