Mu Chen did not move.
Not on the outside.
Inside, he reached.
Not with a big push. Not with anything that would feel like a link. Just a thin layer, like putting a lid on boiling water.
The pressure against his mind softened.
The hum did not stop, but it lost its edge. Like someone had turned the volume down by one small step.
Ye Fan's shoulders dropped by a fraction.
He noticed.
Mu Chen knew he noticed, because Ye Fan's head tilted slightly, like a dog hearing a sound nobody else heard.
Lin Lan whispered, "It's coming out."
The shape slid forward, crossing the line of the door. Mu Chen's eyes tracked it carefully.
It looked like a person at first.
Then it didn't.
Its limbs were too long. Its joints bent wrong. Its skin looked wet under the flashlight, like it was made of oil and shadow. Its face was almost blank, with a mouth that opened too wide.
Zhou Xiao raised his weapon. "Shoot?"
Ye Fan spoke once. "Not yet."
The thing turned its head toward Ye Fan.
It hummed again, louder, like it was happy.
Mu Chen felt it try to press into Ye Fan's senses. Sentinels were strong, but they were also open. Open was how they fought. Open was also how they got hurt.
Ye Fan's jaw tightened. His eyes sharpened, then went a little too far.
Mu Chen saw the tiny signs. The fast blink. The hard swallow. The way Ye Fan's fingers flexed like he wanted to rip something apart with his hands.
Breaking point, Mu Chen thought.
Ye Fan took one step forward.
The thing moved too, like it was pulling him in.
Lin Lan's voice shook. "Major—"
Ye Fan lifted his hand again, silent order.
Zhou Xiao and Lin Lan backed up half a step, keeping Mu Chen between them and the open door, like Mu Chen was the weak point that needed shelter.
Mu Chen hated that.
Not because they were wrong about his cover.
Because he was not weak.
The thing made a sudden rush.
Fast. Too fast.
Ye Fan moved like a blade.
He fired two shots. Clean, center mass.
The bullets hit.
The thing barely reacted.
It twisted, and the sound it made was not pain. It was excitement.
Zhou Xiao fired too.
Lin Lan lifted a small device and threw it. A flash burst near the thing's head. It stumbled, like its senses had been hit.
Ye Fan surged forward again.
Mu Chen felt Ye Fan's mind flare.
It was like a door thrown open in a storm.
Mu Chen did not think.
He pushed just a little more.
A soft pressure, wrapped tight.
Calm.
Hold.
Don't fall.
Ye Fan froze for half a second.
His eyes flicked sideways.
Straight at Mu Chen.
Mu Chen met the look and kept his face blank.
Like he had done nothing.
Ye Fan's throat moved. He swallowed.
Then he moved again, but this time with control.
He grabbed the thing's arm with one hand and slammed it into a metal shelf. The shelf shook. Old boxes fell. Dust exploded into the air.
The thing screamed.
The sound was like metal tearing.
Zhou Xiao cursed and covered his ears.
Lin Lan stumbled back.
Mu Chen kept his feet.
The scream hit his mind too, like claws. He held the shield.
He kept it small.
The thing tried to pull away from Ye Fan, but Ye Fan didn't let it.
Ye Fan's voice was low. "Now."
Zhou Xiao fired into the thing's head.
This time, it reacted.
It collapsed like a puppet with cut strings.
The humming stopped.
The air slowly loosened.
Mu Chen let his power fade back into stillness.
He did it carefully, like putting a knife back into its sheath without letting anyone see the blade.
For a few seconds, nobody spoke.
Breathing was loud in the helmets.
Lin Lan's hands were shaking as she checked her tablet. "Signal is stabilizing."
Zhou Xiao stepped closer to the body, weapon still up. "What the hell was that?"
Ye Fan stared down at it. His face was calm again.
Too calm.
He turned and walked back toward the door, away from the body, away from the dark. Like he did not want to look at it too long.
Mu Chen watched him.
Ye Fan's eyes moved once, quick, toward Mu Chen again.
Not anger.
Not thanks.
A question.
Mu Chen gave him nothing.
They cleared the rest of the warehouse fast. No more movement. No more hum. They found the drone in the back, broken like something had snapped it in half.
Lin Lan took photos and logged data.
Zhou Xiao muttered, "This place was used recently."
Mu Chen looked around and saw small things. A clean footprint in dust. A cable that didn't belong. A lock that was too new.
Someone had made a door with a scanner in an old warehouse.
Someone had put that thing here.
When they returned to the van, the sky was darker. The base lights in the distance looked like a line of cold stars.
The ride back was silent again.
This time, Ye Fan sat with his head turned toward the window.
Zhou Xiao kept glancing between Ye Fan and Mu Chen like he was trying to connect dots.
Lin Lan typed fast on the tablet, making a report that would go straight to the base system.
And to the institute.
Mu Chen's stomach twisted at that thought.
Back at the base, they passed through the checkpoint scanners again.
Beep. Green. Open.
Beep. Green. Open.
The base did not care if they were tired. The base did not care if they were scared. It cared if they were controlled.
When they stepped into the ready room, Luo Wei was waiting.
She took one look at their faces and knew.
"Report," she said.
Lin Lan spoke, clear and quick. "Unknown anomaly. Possible bait. High mental pressure. Neutralized. Drone recovered, damaged."
Luo Wei's eyes moved to Ye Fan. "Any loss of control?"
Ye Fan's face stayed blank. "No."
Mu Chen felt Ye Fan's lie land in the room like a hard object.
Luo Wei held Ye Fan's gaze. Long.
Then she looked at Mu Chen.
"You observed?" she asked.
Mu Chen nodded. "Yes, ma'am."
"Anything to add?"
Mu Chen chose his words carefully. "It felt like the anomaly was trying to read us. Like a test."
Luo Wei's eyes sharpened slightly. "Good. Write that in your report."
"Yes, ma'am."
Luo Wei turned away. "Shower. Food. Then debrief in one hour."
The team broke apart.
Mu Chen went to his corner behind the divider. He sat on the bed and removed his helmet.
His hair was damp with sweat.
He stared at the desk lamp again.
Cold light.
Clean light.
A light that made it hard to hide shadows.
A knock hit the divider.
Mu Chen's spine tightened. "Yes?"
Ye Fan stepped in.
No warning. No softness.
He filled the small space like it belonged to him.
Mu Chen stood. "Major."
Ye Fan's eyes were hard. "What did you do?"
Mu Chen kept his face calm. "Nothing."
Ye Fan took one step closer. "Don't lie to me."
Mu Chen's voice stayed even. "I didn't link. I didn't touch you. I followed orders."
Ye Fan's jaw clenched. "You think I can't feel it?"
Mu Chen did not answer.
Because Ye Fan could feel it.
That was the problem.
Ye Fan's voice dropped lower, rougher. "This unit has rules, Lieutenant. You don't help without permission. You don't touch a sentinel's head without permission. You don't get to decide what I can take."
Mu Chen felt heat rise in his chest. Not anger. Not fear. Something sharper.
He looked at Ye Fan and spoke softly. "You were going to break."
Ye Fan's eyes flashed. "So what?"
Mu Chen held his gaze. "If you broke, they would punish you. They would tighten your leash. They would use it against you."
Ye Fan went very still.
For a second, Mu Chen thought Ye Fan might hit him.
Instead, Ye Fan's voice came out harsh. "You don't know anything about my leash."
Mu Chen's face did not change, but his voice got a little colder. "You called me an orphan."
Ye Fan's eyes narrowed.
Mu Chen continued, simple and true. "You know what it's like to have nobody. You know what it's like to belong to a system instead."
Ye Fan's mouth tightened. His hands curled once at his sides.
Mu Chen watched his hands. He remembered Ye Fan's control, how tight it was, how close it was to breaking.
Ye Fan spoke like the words hurt him. "I grew up in the military."
Mu Chen nodded once. "I grew up in an orphanage."
Silence.
Cold light.
Two kinds of lonely standing in the same small space.
Ye Fan looked away first.
When he spoke again, his voice was still harsh, but not as sharp. "Keep your hands to yourself."
Mu Chen nodded. "I will."
Ye Fan stared at him for a moment longer, like he wanted to say something else and didn't know how.
Then Ye Fan turned and left.
Mu Chen sat back down on the bed.
His hands were steady.
His breathing was steady.
But inside, something had moved.
Ye Fan had seen him.
Not fully.
Not the truth.
But enough to make the next days dangerous.
Mu Chen looked at the cold desk lamp and thought about rules.
Rules were not there to keep them safe.
Rules were there to keep them owned.