Chapter 20 raws have been released.
http://www.alphapolis.co.jp/manga/view_manga.php?no=175
Well this chapter they go shopping. Tuka buys a compound bow and Lelei goes for a notebook and a tablet pc to read books which Itami questions about the electricity. Piņa and Bozes after reading Risa's doujins they have a little misunderstanding and go with Tomita to a library in search of "fine arts" lol.
Next destination are the hot springs.