In the manga Dead Tube, the presenter of a gossip video is talking about the adultery committed by a female politician called 山岡. He says that the woman was also the winner of the buzzwords contest (流行語大賞) with the phrase 「ニッポン死ね」, which I would translate as "death to Japan". Then he says:
あのフレーズは… 保育園に落ちてしまった主婦の嘆きを表現したもの。つまりその言葉の受賞式に現れた彼女は… その主婦達の代表だってこと…！
What has the sentence 「ニッポン死ね」 to do with desperate housewives in a nursery school or with adultery? Here is the page where it comes from for more context. Note that this is the first and last time that the presenter talks about this woman, so no other information is provided. Thank you for your help!