Issho ni Ikimashou Ikimashou Ikimashou

She takes a few steps, then is crushed again with a scream. Death. This cycle has continued for some time. Kyouya awakens in an unfamiliar room, unable to move his body. His calls for help go unanswered, and he spends months, then years, unable to do anything. Eventually, a girl who calls herself "human" appears. When Kyouya begs her to take him outside, he discovers only a desolate world. The girl called "human," who has embarked on a certain mission, tells him: "On this Earth, other than I... and you, no humans remain." She says that all plants and fauna have also perished. Unable to accept her words, Kyouya is carried away by the girl. Thus begins the endless journey of Kyouya and the girl called "human."

In Issho ni Ikimashou Ikimashou Ikimashou, Kyouya awakens trapped in an unfamiliar room after years of helpless isolation. A girl who calls herself human eventually rescues him and reveals that no other humans, plants, or animals remain on Earth, beginning their journey through a desolate world.