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.