It all began two days prior, when Monokuma gave us the additional motive. The time limit added to this killing game triggered the crime. After the announcement, some of us decided to form groups to plan our next move. I had my own plan to find the mastermind, and someone offered to help me... At the time, I never would have imagined they would become the culprit.

To expose the mastermind, the culprit and I set up hidden cameras in the library. There was a hidden door in the library that showed signs of use. We deduced that the mastermind would return there, to let Monokuma out. The next day, we asked Miu if she could modify some cameras for our trap. We then went to the warehouse to gather the necessary materials. All we needed were disposable cameras and a security sensor.

But the culprit found something else there - the murder weapon. That's right. The shot put ball. They put the cameras as well as the shot in their backpack.

Then, on the day the time limit would expire, the day of the murder...the culprit and I collected the modified cameras from Miu and visited the library. Once there, we searched the room for ideal locations to place the cameras. But even then, the culprit was preparing the murder. They began by removing the vent grate, and laid it inside the air duct.

Then, the moved the pile of books on top of the bookcase, pretending to organize them. After that, they placed open encyclopedias on the final bookcase. It appeared innocuous enough, but it was actually a path for the murder weapon! The culprit also tampered with the hidden camera linked to the security sensor. I was responsible for setting up the other cameras, but that one... I didn't even notice their trick. They used duct tape to keep the flash function on.

After the cameras were set, the culprit and I climbed the stairs to the 1st floor classroom. We kept a lookout for the others and waited for the security sensor to go off. During the stakeout, we saw Kaito and six others go down to the basement. Rantaro was with them... The first victim. After watching that group enter the Game Room, I returned to the classroom. With about one hour remaining, the security receiver I was holding went off.

I assumed it was the mastermind, so I ran out of the classroom to the library. I was in such a hurry, I left the culprit behind. Looking back on it now...that was the last chance I had to stop the murder. After I had left, the culprit took the shot put ball out of their backpack...and rolled it into the classroom vent. This set the murder in motion!

Rantaro had moved the bookcase, triggering the receiver. Unbeknownst to him, the trap had been sprung. First, the modified camera took a picture of Rantaro with the flash on. Rantaro noticed the flash and approached the bookcase to inspect the camera. The camera flash lured Rantaro directly into the murder weapon's path!

The shot the culprit tossed into the vent rolled through the air duct...came out of the library's vent, and kept rolling atop the bookcase. Opening the vent grate and organizing the books was all to create a path. Under normal circumstances, the victim would have been alerted by the noise...but the promotional video was masking the sound of the shot rolling. The shot kept rolling, then fell on Rantaro's head, killing him instantly.

By the time we had entered the room, the murder was complete. I imagine...seeing Rantaro's body, the culprit probably thought... "The mastermind is dead, the game is over, now we can all go home..." But their wish didn't come true... Because Rantaro wasn't the mastermind! It was murder...in an attempt to save all our lives. That is the truth.

That's the truth behind your lies... Kaede Akamatsu, the Ultimate Pianist!