Dream?/guide

Ribbon (リボン)
Pink Gate → Ribbon World → interact with the blue ribbon.

Needle (縫い針)
Pink Gate → Ribbon World → interact with the book → Cross Road → go right and open the door → Gem World → interact with the moving green gem → Graffiti Path → go straight left to step on the yellow tile → go right and interact with the big needle.

Tile (タイル)
Pink Gate → Ribbon World → interact with the book → Cross Road → go right and open the door → Gem World → go on the 3 gems from left → interact with the big yuki's tiles.

Red Paint (赤ペンキ)
Sleep on the dream bed repeatedly → Lucid Dream → interact with the door → Table Room (Random) → interact with the red window → interact with the bloodstained yuki.

Book (本)
Black Gate → Sketches World → step on the blood → enter the door → interact with the book on the table.

Strap (ストラップ)
Blue Gate → Sky World → enter the door → Fangames Reference Room → left → Orange Maze → upper-right → enter the door → interact with the girl in the room.

Cup (カップ)
Blue Gate → Sky World → interact with the floating crystal → Teleport Maze → each time on the fork you choose right, right, upper-left, up → interact with the white crystal.

Glass Bottle (ガラス瓶)
After you got Red Paint effect → Sleep on the dream bed repeatedly → Lucid Dream → interact with the door → Table Room (Random) → interact with the red window → go out to the hallway → go left then go to the bottom exit.

Red Flower (赤い花)
After you got the Glass Bottle → Green Gate → Grass World → Green Wall Maze → interact with the yellow floating glows on the top-right → Starry Night World → enter the door → Dark Room → Balcony → interact with the flower.

[After you used the Red Flower, yuki's name on the menu will change into Kayuki. ]

yuki's Other Items
There are two items that can collect after you drop the effects in the effect room, which won't show in the menu and will affect the ending.

Pen (ペン)
Follow the guide of Red Flower to the Dark Room → interact with the pen on the chair.

Paper (紙)
Green Gate → Grass World → Green Wall Maze → interact with the pink floating flower → Gray Rooms Maze → enter the door → interact with the paper on the table.

ED1
Drop all the effect on the tables in the effect room, wake-up and exit the room.

ED2
Drop all the effect on the tables in the effect room, interact with the bloodstained book, go to the end and interact with the injured yuki, wake-up and exit the room.

ED3
To achieve this ending, you must: Wake-up and exit the room.
 * 1) Drop all the effect on the tables in the effect room.
 * 2) Collect all other items (Pen, Red Flower and Paper).
 * 3) Interact with the bloodstained book, go to the end and interact with the injured yuki.

Noise (ノイズ)
Touch eye → Eye World → Go right and up between two narrow bleeding-like objects. → Interact with the monochrome girl.

Feather (羽)
Touch paper → Pen/Paper World → Go left and between two holes on the ground. → Go left again to the Dot Maze. → Navigate your way to two flowers. → Go between them to Flower World. → Interact with the feather.