This is Digan no Maseki for the MSX2 on 3.5" floppy disks, a Japanese-language release with manual and box.
Some of the disks were tested and showed the initial title screen on an MSX. The manual is original and in good condition, though its staple has some rust and there's handwriting on some pages. The box is original and in good condition.
Testing was only done up to the point where the disks loaded — as with old floppy media, there may be some mold present, so playing all the way through the game can't be guaranteed.
