Unknown Exist/guide

UFO
Interact with the teal sheet of paper. Go up and follow the river to the right. Cross the bridge, go right and enter the building. Enter the doorway. Go north-west and interact with the UFO.

Iron Fans (てっせん)
Interact with the dark blue sheet of paper. Go right and up from the entrance. Interact with the one-eyed NPC. Interact with the large fan stuck in the ground.

No Arms (うでなし)
Interact with the purple sheet of paper. Go south-east and interact with the multi-colored twitching flower.

Tanuki (たぬき)
Interact with the red sheet of paper. Go south-west, find and interact with the tanuki cutout.

Flowers (はな)
Interact with the dark blue sheet of paper. Go left a bit and down. Enter the archway. Go up and interact with the blue crystal. Navigate your way through the maze and interact with the black crystal (avoid the chasers). Go left a bit and down. Interact with the stem of the flower.

Ending
Collect all of the effects. Wake up and leave the room. Walk down the passageway and you'll get the ending.