Book End (ブックエンド)/guide

Head
Go to the Creature World, go south-east and interact with the purple floating creature.

Lupe
Go to the School, go to the left path then go to the bottom pathway to School II, go through the way to the west part, interact with the magnifying glass.

Cat
Go to the Gate World, go up one row and interact the little cat.

Paper Knife
Go to the White Paper World, go north-west and interact with the paper knife.

Bell
Go to the Branch World, go south and interact with the bell surrounded by branches.

Tricycle
Go to the Forest World, go straight left until you reach the tricycle.

Wafuku
Go to the Japanese World, go south-west and interact with the Wafuku in front of a stage.

Book
Go to the Ink World, go south-east until you reach a pattern floor then go south, interact with the NPC.

Bat
(It's better to have Light effect)

Go to the Dark World, go north-west and interact with the bat on the tree.

Light
Go to the Light World, go left one row and interact with the light orb that keeps going south.

Wizard
Go to the Forest World, go north-west and find a stair to the Pearl Curtains Pathway, go to the end and interact the blue Hell Block to the Bookcase Hell, go straight left then go up before reach the end, go left and interact with the stick to the isolated place, enter the door to the Magic World A, go north-east and go between the sticks with white diamonds to the Reverse Pathway then go right to the Magic World B (the diamonds on the sticks will change to black color), go south-west and interact with the NPC.

Fog
Go to the Ice World, go west until you reach the big ices then go north, interact with the small ice.

Glass
Go to the Mirror World, go south-west and interact with the glass statue.

Another Person
To get this effect, you must sleep at least 14 times. Go to the Bookcase Hell's south-east part, find the entrance to the Secret Place, go through the way to a room with bookcases, interact with the butterfly.