 If you liked
Dainana Joshikai Houkou
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 ...then you might like
Shoujo Shuumatsu Ryokou
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A manzai duo of teenage girls - in the future! Their relationship and their adventures are the basis of the story. Their use of strange (to them) technology is also a focal point. Dainana Joshikai Houkou is more comedic, though both series have their lighthearted and more serious moments.