I have ran into three bugs during play. The only serious one was a script loop error when talking to the chyunibo after she mad made the comment of maybe not shipping me with other guys, that error crashed the game. there was one where eating breakfast together rendered a black screen and initiated chat with step sis. the final one occured if i say step sis in the living room when her lust was above 40 in which she would have her shower sprite. if you activated the midnight snack she would be shown naked. im actualy not sure if the last one was a bug or just an easter egg you put in.
Love the game just thought you should know in case a larger problem stems off them.