Variety of viruses (Smallpox, Cowpox, Rinderpest and Polio etc.) which WHO and FAO have declared the eradication or with the plan of eradication keep saying "goodbye" to the humans in a cheerful and repetitive manner. The sampled line "Bye Bye Keen" in the work
is a throwaway line of Baikinman, the antagonist of "Anpanman," a popular Japanese animation, when he leaves after being beaten up by the hero.
It is impossible for both mankind and their viruses to prosper, and the world is full of such absurdities. I believe that to dare to approach such absurd problems with a light attitude, rather than looking into the abyss, without staring at them, is to "live without being crazy," which I believe is a cultural act. On the other hand, it seems to me that it is also "living while going crazy.
Osamu Matsuda