I know many people didn't like the side story.....but if you see it closely then it create a good meaning and sentiment....The blond girl didn't know what was missing so she kept making mistakes and trying to fill that missing piece with different girls....She does regret the day she stole her step-sister's girlfriend cause that made her lose the only thing that she loved and wanted....She could not have what she wanted and that's why she got obsessed with stealing from other people just to be able to feel that joy of getting what you wanted but it belonged to someone else just like her step-sister belonged to another girl....They were meant for each other as they complete each other and I am happy that they got together at the end....I think if the author elaborated on the side story and made a whole another story then everyone would understand how their love for each other is great.
I know many people didn't like the side story.....but if you see it closely then it create a good meaning and sentiment....The blond girl didn't know what was missing so she kept making mistakes and trying to fill that missing piece with different girls....She does regret the day she stole her step-sister's girlfriend cause that made her lose the only thing that she loved and wanted....She could not have what she wanted and that's why she got obsessed with stealing from other people just to be able to feel that joy of getting what you wanted but it belonged to someone else just like her step-sister belonged to another girl....They were meant for each other as they complete each other and I am happy that they got together at the end....I think if the author elaborated on the side story and made a whole another story then everyone would understand how their love for each other is great.