Pale Cocoon [OVA]

Humans are living in an underground colony which is the only place where they can live now. Ura, a member of “Archive Excavation Department” is a person who does his job to lengths more than required. He does extra analysis than his job of restoration of records of the lost world. He is quite intrigued by the images that he gets from the records and stores some of them, a lot with green, which he wishes was there somewhere. A co-worker of his passes the records for restoration to him and once even tells him that they should probably leave their jobs.