I love this game, but haven't you thought about making a guide for this game, how to put the correct options in a file or something? Because if I need one ;w;
But how do you explain that there are certain options, sometimes the friendship or love points are lowered for a certain character? Random example: The fight between Pi and Jin ^^"
Just use your intuition for each choice. If you go against a character's values or motives, it'll usually lower their relationship, so just be nice to them overall and you'll get high points with most.