Naegi blinked down at the screwdriver as it rolled to a stop at his feet. Where had that come from? And why had it been in Ogami's bathroom? Had she brought it in from the storage room?

No, he realized as he bent down to pick it up. This definitely wasn't from the storage room. He recognized the small shape and the distinctive yellow handle. This screwdriver had come from one of the toolkits in a boy's dorm.

And not just any boy's toolkit, either. As he examined the screwdriver more closely, Naegi saw long scrapes along the sides – the marks from where he'd used it to try to open the dryer door yesterday. This was his screwdriver.

Or maybe it would be more accurate to say that it was Asahina's screwdriver, since he'd given the toolkit to her yesterday. Had she been carrying it around with her since then? That seemed like it would be awfully inconvenient. The tools might be pretty small, but the toolkit itself was too big to fit in a pocket. Had she just been carrying the screwdriver, then? Why would she –

Naegi froze. Asahina had had a screwdriver. Ogami's locked door had been opened without a key. That couldn't possibly be a coincidence.

This must have been the real clue that Kirigiri had wanted him to find, not whatever was stuck on the sink. With the way that she examined rooms, of course she would have checked something as obvious as a towel on the floor. He headed back out to let her know what he'd discovered. He found her kneeling in front of the bookcase, examining the garbage he'd left there.

"Oh, I guess I should have cleaned that up," he said, frowning at it.

"We don't have time to waste on that." Kirigiri picked up the brown bottle that had been in the trash. "Naegi, what do you think this is?"

"Uh, I don't know," Naegi said. "Protein or something, maybe? Ogami drinks a lot of that, right?"

Silently, Kirigiri turned the bottle so that he could see the front label, with a heavy black skull and crossbones emblazoned on it.

"Oh. That's… probably not protein."

"Unlikely." Kirigiri handed it over, and Naegi nearly dropped it at the unexpected weight. "Take a look for yourself." She walked away as Naegi began examining the bottle.

Now that he looked at it more closely, Naegi thought that he might have seen this bottle before. It looked a little familiar. He glanced over the label. The poison wasn't named, but it did say "Fatality guaranteed within five minutes upon consumption, injection, or inhalation."

The words rang a bell in Naegi's memory. This was the bottle of poison Togami had been looking at in the chemistry lab, or one just like it. Well, he supposed that made sense – whatever was on the needles had to be able to work by injection.

Although now that he was looking at the label, it seemed like that wasn't all it said. There was a small asterisk at the end of the phrase, indicating further information elsewhere. Naegi frowned, wondering where it meant. The other side of the bottle was blank, but – he flipped it over – there did seem to be another label on the bottom.

"Fatal dosage information," he read, frowning. He skimmed over it, trying to work out in his head what the different quantities meant. Injecting the poison definitely looked like it would take the smallest dose, requiring very little as long as it was injected directly into the blood stream. The dosage seemed to change a little according to the victim's weight, but it didn't look like the difference would be more than a few drops. It took much more to kill by consuming the poison, at least a third of the bottle for someone at the top of the weight range, and even more than that for a full dose by inhalation.

"If less than a full dose is administered, possible symptoms may include dizziness, memory loss, loss of consciousness, ongoing breath, continuing pulse, and a drive for vengeance against a failed killer," the label declared. "Be sure to check your math, kids!"

Naegi shivered at the cheerful tone of the text, even on something as deadly as this poison. So this could kill in five minutes? He'd really had a close call with that needle, hadn't he? He wondered if that could have been enough to kill him if Kirigiri hadn't intervened. He hoped not, but he couldn't be sure – not when this had been used to kill someone else already.

He set the poison bottle down with the needles and looked around the room for Kirigiri. He found her standing at the entrance to the room, running one hand along the doorframe.

"Did you find something?" he asked.

"Possibly." She turned to look at him. "Naegi –"

Ding dong, bing bong.

The television in the room flickered to life, showing Monokuma yawning at them. "Oops, you caught me sleeping!" he said cheerfully. "Your investigation was just so boring I couldn't stay awake!" The pseudo-tired expression morphed into a wide, eager grin. "Should I do it? Is it okay? Can I can I can I?" He laughed. "Okay! Then let's begin the class trial!"

As the television turned off, Kirigiri turned and headed over to the bookcase to collect the various pieces of evidence they'd found. Normally she seemed to expect Naegi to carry it all to the trial room, but maybe she'd decided that he couldn't be trusted not to stab himself on any of the needles again. The only things left for Naegi to carry were the screwdriver and the poison bottle, which he could easily tuck into his pockets. Meanwhile, Kirigiri had her hands full managing all the different containers of needles, keeping them separate and holding them without piercing herself. Still, she managed to do it all without looking like it was difficult in the slightest, striding out into the hall at her usual speed.

"Be sure to shut the door behind you," she said over her shoulder as she headed for the trial ground.

Naegi sighed, bracing himself for the long walk over to the red door. He'd had a little time to recover from the effects of the poisoned needle – he hoped it would be enough. He didn't think Monokuma would be very happy about it if he held up the trial because it took him ages just to walk across the first floor of the school.

As Naegi left the room, he pulled the door shut, and to his surprise it wobbled a little under his hand. He frowned. Had it done that before? He tried to think back to when Kirigiri had first opened the door – but he couldn't remember if the door had done anything unusual then. He'd been too focused on the horrifying scene inside the room.

He glanced back at the door – but as far as he could tell, it fit flush into the doorframe without any evidence of tampering. He opened and closed it one more time, and again, it shook as it moved, even more than it had the first time.

Well, he didn't really have time to look into the issue of the door anymore. The investigation period had ended, and it was time to make his way over to the red door to the trial grounds. The class trial was about to begin.