DayDream/guide

Razor (かみそり)
Enter the flashing neon door. Go north and interact with the yellow and pink statue. Go left and up from where you're teleported. Interact with the blood-covered NPC.

Lamp Shade (スタンドライト)
Enter the purple door. Go south-west and go between two lit lamps. Walk down the hallway and interact with the shining lamp at the end.

Sepia (セピア)
(Lamp Shade Effect is needed).

Enter the gray door. Go south-west and between two purple pillars. Enter the other door and keep going right until you see a doorway. Enter the doorway and go up the road. From the doorway, go up once then keep going right.

Interact with the corpse on the road. Go up and interact with the flower.

Deer (シカ)
Enter the brown door. Go south-east and interact with the blade of grass. Go south and interact with the two-leafed sapling.

Student (がくせい)
(It is impossible to get this effect unless you create a Picture file and name it "." (without the quotes))

Enter the blue door. keep going north until you see a bloody orb. From there, go east and interact with the orb pictured to enter the school (if you didn't follow the Picture file instructions above, the game will crash). The effect will automatically be in your inventory once entered.