Ah~ Yeah, I got this problem too but I thought it was because I messed up with my save files. (I run 4 versions of PPSSPP and 3 versions of JPCSP to test this and I'm switching save files among these emulators.) But if you got the same problem, it might be a real bug. T_T
Could you give more details about what you used to play the game? (Ex. PSP firmware, or emulator version.) Thank you very much.
This is a bug that I can't fix. I'll try to get help from other hackers but for now, you can try to save before every date. If this problem occurs, just reload your save later. (The problem occurred randomly for me even though I loaded it from the same save file.) Or you can guess which button to push. (If you mess up, you can reload the save. If you do well, you can just continue playing the next scene.
)