I cannot locate the SD card with the Okuu look alike hybrid (Reimu-Remilia-Cirno).
Because of the bug that you cannot add certain rares with certain rares, I cannot add cirno to this particular batch so I cannot duplicate the Okuu-look-alike with this particular batch.
The game is slowing down already and will likely freeze after a while and it very well could be a certain hybrid that's triggering this bug. As to what hybrid, I do not really know.
Sometimes. for some strange reason, certain hybrids appearing would cause the game saves to become corrupted. What is annoying about this is you wont really know that the bug has happened and you should not save the game.