A Record of Survival of a Teenager in the Wasteland

In 2149, the "Pixel Rain" disaster struck. Electronic equipment around the world collectively malfunctioned and released radiation, mutating some creatures into "pixel monsters" with low IQs but funny looks (such as giant hamsters that spit out rainbow smoke, flying octopuses with their own mosaics), and human civilization returned to a semi-primitive state. Due to their understanding of the electronic culture of the old era, the remaining teenagers unexpectedly became the key group to decipher the remaining technology of the disaster.