Chito and Yuuri board a train that runs below the forgotten remains of the streets above and take it to the end of the line. When they finally reach the surface

(Volume 2) Titus and Yuri continue traveling in a world where the civilization collapsed. What did the two who ventured to the upper level of the city find?

Chito and Yuuri have arrived at the highest stratum, but their journey will not be over until they reach the very top of the city. Along the way, they continue

Even after a mysterious life form tells Chito and Yuri the end of the earth is near, still they continue their everyday adventures together, traveling slowly to

THE NATIONAL AND INTERNATIONAL BESTSELLER - WINNER OF THE 2018 INTERNATIONAL THRILLER WRITERS AWARD FOR BEST HARDCOVER NOVEL "The first great thriller of 2017 i