Learning to be cherished

As an emotionless boy lives his life without gradient, he slowly walks through the rain by himself. As he walks, he comes across a mysterious girl who was also under the rain, but it seemed like the girl was completely different from the boy. She notices him and feels shocked, "What're you doing in the rain?! You'll get a cold!" 'What about you though?' The boy said softly, but the sound of the rain covers his voice. What kind of sparks could come out from these two? Read to find out!