Please Save My Earth(ぼくの地球を守ってBoku no Chikyū o Mamotte) is a shōjo science fiction manga by Saki Hiwatari. It was published by Hakusensha from 1987 to 1994 in Hana to Yume and collected in 21 tankōbon volumes. The series was adapted as a six-part anime original video animation (OVA) in 1993. Both the manga and OVA are licensed for distribution in North America by Viz Media. The series is about seven Japanese teenagers who share common dreams about their past lives as alien scientists who observed the Earth from the Moon.