"22 Shìjì Yáogǔn Wángzǐ" is an original YANHE song by Yu Jianliu. It is featured in the album 354 Jījiǎ Shàonǚ Qíshìtuán. After the year 2159, Pacific's second largest city, Tigris, suffered from a major attack by an unknown organism and much of the city and population were destroyed. The teenagers of the city gather outside of the Eridu Subway to sing this song.