With them being naked and horny, he disregards the comfort for now, and just letting go and seeking relief. This intimate contact he learns relieves the pent-up energy and stress of sharing the room together on the train.

"Very good." He murmured as he arched his back, and even grinds his hips for the needed friction. "Nnngh...but how about you? Do you want me to relieve you?"

Xingchen's hands are slender, smooth, and large. Definitely wielded his sword shuanghua with deft and skill. His hands wander over his body to map it, feeling the shape of him until he rests on his hips, not going further, seeking permission, teasing him with anticipation to grow hard with his touch.