ぼくの地球を守って [Boku no Chikyū wo Mamotte] Series by Saki Hiwatari

Alice has had her own "moon dream," in which she was the beautiful Mokuren. Sure in the knowledge that, if they have found Mokuren, perhaps they can find the other people in their "moon dreams," Jinpachi sets out to do just that. But it's Issei's odd idea of running a letter in a cult magazine that brings them success--they have foound Hiiragi and Shusuran! Their real names are Daisuke and Sakura, and it's from them the others learn the tragic truth... moreAlice has had her own "moon dream," in which she was the beautiful Mokuren. Sure in the knowledge that, if they have found Mokuren, perhaps they can find the other people in their "moon dreams," Jinpachi sets out to do just that. But it's Issei's odd idea of running a letter in a cult magazine that brings them success--they have foound Hiiragi and Shusuran! Their real names are Daisuke and Sakura, and it's from them the others learn the tragic truth. The dreams are not of their future lives, but of their past as alien observers on the moon. After their home star system was destroyed, they contracted an incurable disease and quickly died, one by one. That's why they're all about the same age.What they don't know is that the reborn Shion and Shukaido are also in the Tokyo area. But what does all this have to do with Rin and his quest for the Tokyo Tower? less

Are the woes of the present meant to be endured for the promise of a better future or to atone for past wrongs? In a captivating epic of love, fate and faith, seven young people must struggle with this spiritual puzzle as their alien past lives threaten the future.Rin knows almost everything now, but he's keeping it to himself. When he met the others, Rin lied, claiming he was Shukaido, the age difference due to being reborn twice... moreAre the woes of the present meant to be endured for the promise of a better future or to atone for past wrongs? In a captivating epic of love, fate and faith, seven young people must struggle with this spiritual puzzle as their alien past lives threaten the future.Rin knows almost everything now, but he's keeping it to himself. When he met the others, Rin lied, claiming he was Shukaido, the age difference due to being reborn twice.In truth, Haruhiko is the reincarnation of Shukaido, and Rin has made sure he knows the reason behind their age difference--Skukaido's treachery, which left Shion alone on the moon for nine maddening years! Shion's obsession to protect Earth has been passed on to Rin, who is intent on destroying the Moon Base and all traces of their potentially Earth-destroying past.Overwhelmed by his past life, Haruhiko has cut himself off from everyone. When Tamura insists on talking to him, he sees more than he bargained for--including Haruhiko disappearing in front of his eyes! Having teleported to a river, the distraught Haruhiko jumps in! Issei and Sakura happen to spot him and try to save him. Will Issei make it in time? less