Space Sirens by Julie Dillon
The last remaining astronaut watched helplessly as his comrades left the ship one by one and were carried away deeper into the nebula. He told himself that he would not succumb the way his shipmates had; he knew he would struggle. But the creatures, if they could even be called that, somehow seemed to know him, and when his turn came and the singing of the cosmos reached a crescendo in his ears, his mind emptied of all but the desire to join them in the void. Gazing into the creature’s face, he mused on how tender, how gentle its embrace seemed, and even as his oxygen supply dwindled he did not resist.