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One of Natsume's strengths is that she gives her characters jobs. In a prior series, False Memories, the main characters work for a toy company and its marketing firm/distributor. In Candy Color Paradox, the main characters work for a weekly magazine (the equivalent, as far as I can tell from the description, of People magazine: serious news alongside gossip stories).
I've said it before--I'll say it again: giving characters jobs strengthens their characterizations.
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On the other hand, Kaburagi, the photographer, is the one who came up with the initial leads through his networks and his willingness to obfuscate in order to get information. His strength is his adaptability.
One can see why the bosses put them together. One can even see why a relationship might work. Their strengths complement each other.
Very smart writing.