Alexander was deep in thought after getting home. Lying on the bed, he couldn't sleep. The image that Natalie and Sebastian walked out of the door tonight lingered in his mind. Although Sebastian just opened the car door for Natalie, Alexander felt sad.

"Oh. Why I can't sleep tonight? Why do I think so much? She has nothing to do with me! Sleep!" Alexander complained.

Alexander never thought that he would have not slept all night and feel so sad because of a ...