Wonder what's the Japanese word they translate as "manservant" in English...
It gotta be quite an ambiguous word, because when Ichika tries to picture herself in Jirou's place her mental image is of herself in the role of a DOG, on her knees and tongue lolling out, while Aria pets her tenderly.
(And she looks turned on by the idea, lol. Normally, that's where you include a caption saying "Something awakened inside her!")