Isaac snapped his notebook shut with a sharp click. The sound reverberated across the small park where they had been experimenting.

  "We're done for today," he said flatly.

  Kai froze. "Done? That's it? We barely—"

  "We've tested enough," Isaac interrupted, flipping the pen in his fingers. "You're exhausted. Every thirty seconds, your mind drifts. You fidget constantly. If something actually happens, you'll misinterpret it entirely."

  Kai pressed his lips together. He hated admitting it, but Isaac was right. His body felt heavy, tense, and sluggish. Even his thoughts seemed thick, like wading through water.

  "I'm fine," he muttered, though it sounded hollow.

  Isaac held up the handheld mirror. Sunlight glinted off its surface, scattering a streak across Kai's sleeve. "Go home. Rest. We reconvene tomorrow. Same park. Same time. And no experiments alone tonight, understood?"

  Kai hesitated. He wanted results—proof. Something tangible. Something he could finally pin down about the mark. But the exhaustion pressed down on him, slowing his steps even as his mind raced.

  Isaac's voice softened slightly. "Don't spiral alone tonight. You overthink when you're tired."

  Finally, Kai nodded. They exchanged instructions for communication: simple messages only, no calls unless urgent.

  The walk home was quiet. His theory should have worked. The mark had reacted before—after pain, after emotional agitation, after calling Claire's name. So why hadn't it activated today?

  Or was he just fooling himself, seeing patterns where there were none?

  When Kai reached the house, light spilled from the living room. Claire was waiting, of course. She always seemed to know when he would return.

  She sat on the couch, phone in hand, leaning against the armrest. The moment she saw him, her posture straightened.

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  "You're back," she said, her voice carrying both warmth and subtle relief.

  "Yeah," Kai replied, trying to sound casual.

  "You look tired."

  "Isaac sent me home."

  "Oh?" She tilted her head, a flicker of amusement crossing her face. "That's considerate."

  Kai shrugged. "He said I'd mess up the observations if I pushed further."

  She studied him carefully, eyes scanning his posture, his expression. "You trust him?"

  The question felt casual, but it tugged at him.

  "I… I think so," Kai said. "He's reliable."

  "That wasn't what I asked."

  Kai hesitated. "I don't know him that well yet."

  Claire nodded, as if confirming a silent thought. Then she moved closer, brushing a hand along his sleeve, smoothing an imaginary crease.

  "You've been thinking too much," she said softly.

  Kai stiffened.

  "Did it react?" she asked, voice careful.

  He didn't answer.

  Her hand lingered. The sensation pulsed lightly again. Subtle. Intentional. But still, the mark didn't change.

  Claire's eyes flickered with something unreadable. "You're tense," she said softly.

  "I've just been thinking," Kai admitted.

  "About the mark?"

  He hesitated. "Maybe."

  She walked past him to the kitchen. "It's just a tattoo," she said casually. "You're convincing yourself it has powers."

  Kai's chest tightened, but he didn't respond. The warmth from the mark lingered in his skin. Ordinary, mundane, yet there was an unexplainable mysteriousness.

  Dinner passed in quiet conversation. Claire spoke about the new café down the street, a show she'd been bingeing, groceries she wanted to try. Kai listened, noting the ordinaryness of her

  Her hands keep brushing against his, lingering longer each time. Each contact brought the same faint pulse beneath the ink. Not enough to trigger a change, but enough to remind him the mark wasn't random.

  Later, when they settled onto the couch, Claire leaned against him as they watched nothing in particular. Her head rested lightly against his shoulder. Her hand, idle at first, drifted over his forearm.

  The mark pulsed again. Subtle, contained.

  Kai pulled his arm slightly away. "You're cold," he said lightly.

  She tilted her head, eyes softening. "I missed you."

  The faint pulse beneath the ink lingered in his mind. Not a change. Not yet. But unmistakable.

  When bedtime came, they lay side by side. Claire's hand touched the mark, The sensation sharpened, lingering, but still the mark didn't transform.

  Kai's mind raced. If Claire's touch, her presence, even her casual words triggered anything at all, why hadn't it fully activated?

  The quiet pressed down. Claire shifted closer, hugging his shoulders, her warmth pressing against him. The mark pulsed again, soft but undeniable.

  Kai swallowed. Something inside him stirred—but it wasn't just the mark. It was everything else: the connection, the closeness, the tension between who he was now and who Rey had been.

  And it was dangerous.