When the character who's the actress for the character of Iko in Cosprayers comes to meet up with Ikita in the episode, she asks if the person she was with was her "boy toy" (as the editors decided to put it). The japanese for this is "wakai tsubame". A 'wakai tsubame' or translated into English, 'young swallow' refers to a young man who's fallen in love with an older woman and currently is "together" with her.