The light smell of milk brought Samuel back to his senses. He looked at Lucas and was in a mixed mood. He didn't know what to say.

Lucas did not speak and sat quietly beside him. He just seemed to want to sit and he didn't care who was next to him.

Samuel found out that he was depressed.

Joseph was also four years old, but he was carefree and willful. He laughed when he is happy and he cry when he sad . On the contrary Lucas is calm and mature.

The first time he saw Lucas was in the airport bathroom. Lucas frowned and begged him. But now...