Kokoro wo Chikara ni: The story follows the human girl Yakumo, who awakens from cryogenic sleep in a devastated world destroyed by genetically engineered lifeforms, Enterrans. With the help of a few friendly Enterrans, she goes on a journey to find more human survivors and bring peace between the two factions.

Owaranai Chikyuu: After restoring the world to order, one threat remains for Yakumo and her friends. The cause of the war itself, hidden deep inside a meteorite that crashed at the start of the war, a cause that's about to resurface.