While you are in the train, you see a beautiful pink-haired girl lost in thought, looking like she is going to cry. You can approach and help her in a nice way, or you can be a dick about it. Throughout the game you will get to choose your preferred answers and that will lead you to a good or a bad outcome of the game. If you mange to help her, she will tell you about her troubles and you can follow her to her destination. The great thing about this is that if you get on her good side, you can also get to fuck her in the end!