Please Save My Earth is a Japanese manga series written and illustrated by Saki Hiwatari. It was published by Hakusensha from December 1986 to May 1994 in the magazine Hana to Yume and collected in 21 tankōbon volumes. It is about six young people and a seven-year-old boy who share common dreams about their past lives as alien scientists who observed the Earth from the Moon.

Hana to Yume , also known as HanaYume (花ゆめ), is a semi-monthly Japanese shōjo manga magazine published by Hakusensha on the 5th and 20th of every month. The magazine is B5-size, and always comes with furoku or free supplements, such as drama CDs, pencil boards (shitajiki), manga anthologies, stationery, and calendars. Hana to Yume was ranked 4th by Japanese girls as their favourite manga anthology in a survey conducted by Oricon in 2006.