Log Horizon Season 1 Episode 18 Expeditionary Force ( Air Date 2014-02-01 ) Genre Animation, Action & Adventure, Sci-Fi & Fantasy, Comedy category. Overview "Princess Laynessia Cowen vows to go to the city of Akihabara herself and beg the adventurers for help against the goblins. The members of the Crescent Moon Alliance can't conceal their excitement at meeting a real princess.".