Mortals and Fools

"Mortals and Fools," alternatively "A Cruel Dream," is a song in Death Note: The Musical.

Overview
After finding the Death Note and meeting Rem, Misa Amane is intent on finding Kira. With some reluctance, Rem tells Misa about the shinigami eyes and that it will cost Misa half her remaining lifespan. Misa insists on the trade, but Rem doesn't think it's worth it because Kira is dangerous, and they sing this song.

The song is later reprised after Misa and Light meet, sung by Rem and Ryuk. Rem's growing feelings for Misa are apparent, and at the end of the song, Ryuk reminds Rem not to break the rule about helping humans.

English version
The song was originally written in English, but an English-language version has not been released. The original English title of the song is "Mortals and Fools".

On July 10, 2017, script-writer Ivan Menchell shared the English lyrics when a fan asked him on Twitter.