The 4th Island[edit]
After some scenes, it's time to explore a new island. Go to Central Island and examine the bridge under the gate marked with a 4. Enter the Horror House (or Monomi House) and speak to Sonia and Fuyuhiko. Examine the door to the house to summon Monomi. You can't go inside for now, so leave the area and continue right to Nezumi Castle. This mouse theme seems awfully familiar, but after the scene, you should turn your attention to the top-left of the screen, where Hidden Monokuma #1 is poking out from the castle's wall. Speak to Gundham, Kazuichi, and Nekomaru here, then examine the castle's doors. Again, you can't enter, so leave the area and continue right to the Rollercoaster.
At the Rollercoaster, start by panning the camera to the right; Hidden Monokuma #2 is sitting in one of the cars. Speak to Akane and then exit, continuing right to the Funhouse. Speak to Nagito and Chiaki (pan the camera left to see her), then examine the train to finish here. Return to the Rollercoaster for a scene. Speak to everyone after the scene, then examine the train for another scene, after which Hajime will end up in a new area to explore.
Funhouse[edit]
Speak to Nekomaru once you're in control again, then leave the area. Turn left to find Hidden Monokuma #3, sitting in a giant pail in the corner of the room. Take the stairs and enter the lounge area. Examine the clock and the telephone, and speak to Sonia and Gundham before exiting the area. Take the next set of stairs to the first floor. Here, you can speak to Kazuichi, Chiaki, and Nagito. Examine the elevator and the doors to the Final Dead Room for an appearance from Monokuma. Finally, go down the Strawberry Hall and examine the doors at the end. Examine the next set of doors here, then exit and approach the elevator. Speak to everyone else before speaking to Monokuma.
Hajime is once again in a new area to explore. You can speak to Akane, Fuyuhiko, and Nekomaru here. Go down Grape Hall and examine the doors at the end. Examine the next set of doors here, then speak to Chiaki, then everyone. Examine the elevator to return to the previous area. You can speak to everyone again before examining the Strawberry Hall doors for a scene. Enter the Crummy Room to the left of the Lounge to go to sleep. The next morning, enter the Lounge to find out the time. Afterward, you can choose three people to spend Free Time with, excluding Chiaki, who is too deep in thought to be bothered. In the meantime, take the stairs up to the third floor and enter the Reference Room/Monokuma Archive. Turn to face the room's exit; Hidden Monokuma #4 is hiding behind the statue to the left of the doors. For Hidden Monokuma #5, go to Nekomaru's room in the strawberry side of the Funhouse and find it peeking behind the desk.
After Free Time, return to Hajime's room. The next morning, exit the lounge and go down the stairs to Grape Hall and examine the doors for a scene. Two more Free Time opportunities follow. Examine the doors to the Final Dead Room in the strawberry area afterward. A few more scenes will follow, after which you can go to Grape Tower for a deadly discovery.