The ending tune of the curious anime Jinrui wa Suitai Shimashita/Humanity Has Declined, by Masumi Itou. The lyrics are translated here. You can follow the score here.
Trivia that matter
The ending tune of the curious anime Jinrui wa Suitai Shimashita/Humanity Has Declined, by Masumi Itou. The lyrics are translated here. You can follow the score here.