One Day In The Western Year 2031... It's unknown how long the Blue have actually existed. The first confirmed sighting came in 2017. That was fourteen years ago. At first we thought they were a biological weapon that some rogue nation had developed but we soon learned they were very different. One Day: It is the year 2031. Humankind has been replaced as the dominant species by a race of monstrous insect-like creatures known as Blue. Sleeper Yuji Kaido finds himself thrust in