E Nikki (えにっき)/guide

Cicada (せみ)
Go to Starry World and interact the yellow moon to the Fruits World, climb down the ladders to the Ladders Area, climb the left ladder to Music World and find a music note flower to the Season Field (Spring), interact the cherry blossom tree to change the season to summer, then interact the cicada on the left tree.

Eraser (けしゴム)
Go to Notebook World and find the Kanji letters, interact the wrong word (計算 was written wrong ) will trigger an event and the eraser will appear, interact with it.

Firefly (ほたる)
Go to The Docks A and go straight up until you reach the Teru Teru Bozu to the Crayon Cosmic World, find the small little firefly on the center.

Watermelon (すいか)
(You must have the Swimsuit effect first)

Go to The Docks A and find the way to the Beach, walk down to the seaside and equip Swimsuit effect to swim over to another side of the beach, then interact with the watermelon.

Swimsuit (みずぎ)
Go to Starry World and find the blue spade to The Docks B, keep searching for the blue fish on the edge of docks for 5 times will trigger an event, then your will get the effect.

Tree (き)
(You must have the Swimsuit effect first)

Go to The Docks A and find the way to the Beach, walk down to the seaside and equip Swimsuit effect to swim over to the gate to The Docks Waterway, enter another gate on the center to the Sewers Maze, go to the exit to the Pathway Painting that leads to the Leaves World, find the portal among the seedling to the Big Tree, interact with the big tree will give you the effect and bring you to the nexus, which also added the new nexus portal to the Leaves World.

Xylophone (もっきん)
Go to Starry World and interact the yellow moon to the Fruits World, climb down the ladders to the Ladders Area, climb the left ladder to Music World and find all 7 music note to return them to the front of the stage, then there will have a big rainbow music note appear on the stage, interact with it.

Fruits Basket (フルーツバスケット)
Go to Starry World and interact the yellow moon to the Fruits World, find the fruits basket.

Sunflower (ひまわり)
After you got the Tree effect, you will have the chance enter the Monochrome Maze by stepping on the gray floor in Leaves World, walk through the maze and interact with the big monster to Hand Flower Pathway, interact the hole on the flower at the end will trigger an event, then you will get the effect and be forced to wake-up.

Straw Hat (むぎわらぼうし)
Go to Starry World and interact the yellow moon to the Fruits World, climb down the ladders to the Ladders Area, climb the left ladder to Music World and find a music note flower to the Season Field, go to the top exit to Hazuki's House, avoid the chaser and go left to the hallway, enter the door to Hazuki's Room and interact with the present on the floor. Furthermore, interact with the leaf will also bring you to the nexus and add the new nexus portal to Hatsuki's Room.

Varicolored (いろいろとりどり)
Go to Notebook World and find a hole to the Sketches Pathway, step on the hole on the end to Graffiti World, find a plain white floor and step on the 6 different color graffiti patterns in front it that change Hazuki's color, walk on the plain floor and press Shift will paint the piece of the floor changes to the graffiti patterns, paint about 40 pieces floor will give you the effect.

Extra Effects
After you interacted withthe big tree, two leaves doors will appear on the upper right and bottom left of the entrance in Leaves World, enter the upper right door will trigger an event then you will get the E Nikki (Picture Diary) which can show the painting of Hazuki's Dream, and after that the door will shut permanently. Enter the bottom left door you will find a tree with two hands, interact with its hands while equipping effects will give the effects to the tree to combine the effect, but it can only combine Watermelon & Swimsuit effects which gives you Suikawari effect.