Boku no Chikyuu wo Mamotte

Mystic dreams of a previous life in the moon lead to the bonding of seven students in an attempt to uncover the secrets behind what they have forgotten. As various truths are sought and avoided, Alice must hurry remembering if she is to save the fragile Rin from self-destruction. For only after facing the grave errors of the past, can they all move forward and live fully in the present.

(Source: MangaTraders)