As Hoseok and Vivian walk back to the lab after the meeting, Hoseok can't keep the grin off his face.

"I told you," Vivian says, bumping her shoulder against him. "You nailed it."

Hoseok runs his hands through his hair, feeling giddy. "Jin always made it seem like they secretly hated the whole experiment and that it was hanging on by a thread. They were all eating out of my hands in there."

"Because you're a genius, baby," she says, intertwining her fingers with his and giving his hand a gentle squeeze before letting go so no one sees.

"We're celebrating tonight," he leans over and whispers in her ear, and he can feel her shiver beside him.

Hoseok straightens, and he frowns when he sees Yoongi waiting just outside the lab, pacing with his hands buried in the pockets of his white lab coat.

"Yoongi?" Hoseok asks. "Why aren't you in there with Dahlia?"

"Can I talk to you?" Yoongi asks, his eyes flitting to Vivian. "Alone?"

Vivian frowns. "Are you okay, Yoongi? You seem upset."

Yoongi sends her a tight smile. "I just need to talk to Hoseok for a second."

Hoseok purses his lips before turning to Vivian. "Go get yourself some lunch. You've definitely earned a break after how much you helped me in there."

Vivian smiles at the two of them. "I'll see if Namjoon wants some food."

After she's out of earshot, Yoongi's gaze snaps to meet Hoseok's, his words spilling out before Hoseok can utter a word.

"There's something seriously wrong with her," Yoongi says, his voice low.

"Vivian?" Hoseok asks, frowning.

Yoongi rolls his eyes. "No, dipshit. Dahlia."

"Why?" Hoseok asks.

He shakes his head. "She just... she knows things."

Hoseok laughs. "That's a good thing. We wouldn't want her to be braindead."

Yoongi groans, his hands leaving his pockets to run through his hair. "No. She knows things she shouldn't know. Personal things about me."

"What do you mean?" Hoseok asks, his own hands falling into his pockets.

Yoongi sighs, his eyes darting everywhere but Hoseok. "Like I said, it's personal. I don't want to announce my secrets to the world. But somehow, she knows."

Hoseok rolls his eyes. "She probably overheard you talking to someone. Who knows? Maybe she could hear us talking while she was still unconscious."

Yoongi takes a step closer to Hoseok, lowering his voice even more. "Hoseok, what she told me is something I have never told anyone. I wouldn't ever tell a soul, but she knew about it and taunted me. She really fucking scared me, so I made up a dumbass excuse to leave and I've been standing out here ever since."

Hoseok bites the side of his cheek as he watches Yoongi slowly take a few steps away from him.

"Maybe that's why Jin and Jungkook left. I'm telling you something isn't right with that thing, and I'm not stepping another foot into that room. If you're smart, you'll stay away too."

Before Hoseok can say another word, Yoongi turns on his heel and walks away.