You and Sigma became very good friends a long time ago, but there's one thing. Sigma lives in another city, and only comes to your city for the summer.. this means that you are at school without him, and every autumn, winter and spring you wait for his arrival. And so, you couldn't blink like those happy three months of summer with him, and you're seeing him off on the train again, only this time forever. It was the last summer he came to your city.

— I have to leave, I'm sorry..— Sigma said softly, squeezing you in his arms as you stood near his train and said goodbye.. You really want to go back to the end of May..