天の声バンク (Ten no Koe Bank) is not a video game. It is not a manga. It is not a hybrid of the two. It is not a Big Mac and chips. 天の声バンク (Ten no Koe Bank) is an accessory that was released for the NEC PC Engine video game console in 1991. The PC Engine console was not afforded a great deal of on-board memory, and managing save games was a problem that quickly required addressing.
A handful of years ago, I forget exactly when but let us say circa 2011-2013, I was given these 3 sketches from someone whom I purchased some video games from. I hadn’t paid much attention to them since I got them, the person who gave me them simply said something along the lines of I have these sketches, do you want them? I’m not sure if they are real, but you can have them if you want. I agreed, received them, looked at them and didn’t think of them any more. Until today.