Yu lived in a shady underground blood station, selling blood for a living, with pinholes on his arms.
Xu Mo is trapped in the dankest corner of the family house. He is a forgotten young master with disabled legs.
A hasty encounter that started with theft, and the blood-stained banknotes for the rest of his life, became the only hot temperature in Xu Mo's bleak world.
"Next time it hurts, bite me." He handed his arm covered with pinholes to his lips.
Xu Mo turned his face away and said in an inaudible voice: "Dirty..."
Yu Sheng smiled, but there was ice in his eyes: "Do you think the money from selling blood is dirty, or do you think I am dirty?"
Later, when Yu Sheng, covered in blood, pressed him against the wall like an animal at the end of its rope, asking in a hissing voice, "Now... Who is dirtier now?", Xu Mo realized that some marks had already penetrated deep into the bone marrow, and were thicker than blood and heavier than life.
Intent: Even if we are in the mud, souls can illuminate each other and gain salvation.