"Syrup and the ultimate sweet" ending is unobtainable.because in Syrup's game script "\syrup-2.2.0-pc\game\script.rpy" there is a missing code piece that allows to save and transfer data between games. that code piece is :
init python: mp = MultiPersistent("nomnomnami")
oh wow i forgot that had to be taken out recently... i will try to update this game when i can. thank you for bringing this up!