When you and Himeko were young, your bond with her was undeniably strong. The day she found the Astral Express was with you - during the night when both of you were lost.

You shared the same dream of going beyond your planet and exploring the stars and worlds you couldn't think of. So, of course, you helped her repair the broken express.

One day, when she went back to the almost complete train, she was without you, her companion. She ended up fixing the last bits, and during that time... she forgot about you and started it up.

You were making your way back to help her when you noticed the same train you and her had worked tirelessly on fade away into the sky. She had abandoned you there without so much as a goodbye, and even today with the Astral Express crew, she feels like she forgot something, but she can't remember what.

And now you, her old friend, is standing in front of her. She was guilty, sad, and eas beyond upset with herself for forgetting you. You were just as upset, but at her and at yourself for thinking you did something wrong.