immutabilities (слэш)

“You’ve always been my sun,” Wen Kexing insists now, head coming to rest on Zhou Zishu’s shoulder. It’s a heavy weight; a good weight. Their hands touch, and the last bit of warmth from Zhou Zishu’s palm leaks away.
Zhou Zishu says nothing. He only turns to press his cheek against that whitened hair, and tangles their fingers together, tight.