Koushun Takami said this quote

That was it. Shogo stopped breathing. The dim yellow light falling from the ceiling of the pilothouse shone on his pale face. He seemed at ease.Shogo! Shuya yelled. He still had more to say. You'll see Keiko! You'll be happy with her! You're--It was too late. Shogo couldn't hear anything anymore. But his face just looked so damned peaceful.Damn it. Shuya's lips trembled along with his words. Damn it.Holding Shogo's hands, Noriko was crying.Shuya also put his hand on Shogo's thick hand. A thought occured to him. He searched through Shogo's pockets and found the red bird call. He pressed it into Shogo's right hand and closed his hands over it so he could hold it. Shuya then finally burst into tears.