TGL Planning has the most consumer friendly UMD Passport pricing scheme yet! If you have the UMD version of The Promise I Made Over This Blue Sky: Paradise In the Palm of Your Hands, you'll be able to get the download version for the low price of ¥100.

The download version usually costs ¥5,040, so this is quite the savings. Assuming the listing at Sony's PSP catalogue isn't in error, of course.

Even when played on your PlayStation Vita, the game won't have the adult scenes of the PC original. But it will have scenes like this: