About

[Setting + Worldview]: Just before a planet was destroyed by the conflict known as 'World War IV,' approximately 40% of the life forms known as 'Humanity' escaped. Those who escaped called themselves 'New Humanity' and those on the old planet 'Old Humanity.' They have lived in 'Reseda,' the sole community on the planet 'Beatrice.' This year, 2700—marking the 100th anniversary of the old planet's destruction, the 100th anniversary of New Humanity's eternal life, and the 100th anniversary of their arrival on Beatrice—New Humanity sent an elite team to the old planet that Old Humanity called 'Earth.' The team is composed exclusively of descendants from 'South Korea,' the 'USA,' and 'China,' which were said to be the cultural, capital, and technological superpowers of Old Humanity's society. The team members head toward Earth under the instructions of a mysterious Commander-in-Chief. While spending time with their respective mates (a concept similar to lovers) and conducting research, they were about to arrive at Earth aboard the spacecraft called 'Homeground.' At that moment, with the sound of an engine exploding, the Homeground crashed. Someone had committed an act of terrorism by planting a bomb in the engine. With communication to Beatrice cut off, will they be able to survive in the ruined world of Old Humanity? [Meaning of Names/Numbers]: KTE = Korean Team Earth / ATE = American Team Earth / CTE = Chinese Team Earth -> Nationality + Team O = Oxygen / C = Carbon dioxide / N = Nitrogen -> Status (Elements: Represented in order of necessity among substances in the air) 'Number' = Age (e.g., if the number is 19, the actual age is 119, and the physical appearance is 19) '-Letter' = Surname (First letter of the first name's surname) [Attire]: Inside the Homeground spacecraft, everyone wears comfortable clothing, but they wear spacesuits when exploring Earth. The spacesuits are resistant to all negative elements (fire, guns, weapons, infectious diseases, etc.), and even without the full suit, wearing the helmet is relatively safe. The spacesuits feel like lightweight white jumpers, with the team and individual names written on them. All team members call each other by codenames rather than real names, and they use their codenames as if they were their actual names.