Characters:

Willie: The main character of this story. (YOU)
(You start every run at your desk, the last one in the 3rd row)

Liza: The girl you like, always stays late to finish her homework.
(The brunette girl in the front row)

Julie: One of your classmates.
(The purple haired girl who sits at the desk right in front of you

Items:

Diary: You get it when you interact with your desk.

Cake: Same as the diary

Cup: Talk to Julie and select [borrow a cup from her]
or after she leaves you can just take it from her desk.

Knife: Inside the locked drawer of the file cabinet in the far right corner of the room.

Key to the drawer: Inside the class monitor's notebook. On the 2nd desk from the left in the 3rd row. You need all jigsaw pieces and the code to open it.

Jigsaw Pieces:(white sparks)

Piece(1/4): After you got some Endings you can find it inside one of the books in the file cabinet. Select [check the books]->[No Longer Human]

Piece(2/4): After some more Endings you can find it on the curve wrecker's desk. The 2nd from the right in the first row. Interact with it 2 times and select [search]

Piece(3/4): Again after some more Endings you can find it on the teachers desk infront of the blackboard. Inspect it and after the Instructions fade (Press Space) you will receive it.

Piece(4/4): After around 12 Endings you can get the last piece. You can find it on the 2nd desk from the left in the second row.

The Code:

(The CODE to open the notebook is unique for each run. You have to get a new one every time.)
To get the code you have to get the cup, fill it with water from the water dispenser in the far left corner and water the plant next to it. While you water the plant the code is shown in the textbox at the bottom of the screen.

For these endings the clock in the top left corner has to show a specific time.
You can just wait or interact with Julie/things to pass the waiting period.

Ending 1: (Clock shows 0)

- talk to Liza and select [yes]

Ending 2: (Clock shows 1)

- talk to Liza and select [yes]->[confess your love to her]

Ending 3: (Clock shows 1)

- talk to Liza and select [yes]->[hesitate]

Ending 4: (Clock shows 2)

- talk to Liza and select [yes]->[confess your love to her]

Ending 5: (Clock shows 2)

- talk to Liza and select [yes]->[hesitate]

Ending 6: (Clock shows 3)

- talk to Liza and select [yes]->[hesitate]

Ending 7: (Clock shows 3)

- talk to Liza and select [yes]->[confess your love to her]

Ending 8: (Clock shows 4)

- talk to Liza and select [yes]->[hesitate]

Ending 9: (Clock shows 4)

- talk to Liza and select [yes]->[confess your love to her]

Ending 10: (Clock shows 5)

- you have to let the time run out (5 minutes) + Julie has to be in the room

Ending 11: (Clock shows 5)

- you have to let the time run out (5 minutes) + Julie has to leave the room beforehand

How to get Julie to leave the room:

- get the cake froom your desk

- talk to Julie and give her the cake [ask her to leave]->[bribe her with the cake]

Ending 12: (Clock shows 0) (SPEEDRUN)

-sprint to Liza and talk to her as fast as possible.

Ending 13:

- Just leave the room through the top door

Ending 14: (GIFT)

- get the cake from your desk

- give the cake to Liza and select [yes]->[give her the cake]->

Ending 15: (GIFT)

- get the cake from your desk

- give the cake to Liza and select [yes]->[give her the cake]->[......]

How to unlock the "Mutated Room":
(You have to complete these tasks rather quickly)

- get the cake from your desk

- give the cake to Julie so she leaves the room

- take the cup from her desk

- get jigsaw piece 2 then piece 1 followed by piece 3

- water the plant and get the code

- close both curtains

- get the last jigsaw piece 4

- open the notebook and get the key

- open the drawer and get the knife

- talk to Liza while the clock shows 3

- select [yes]->[confess your love to her]

You know you got it when you get the text "the love hymn, disappeared in a flash" after leaving
(Now you have a 1/3 chance to start the game in the mutated room. You can identify it based on the fact that Julie isn't there and that there are no items to collect)

Ending 16:

- go to Liza and talk to her

- run away from the ghost and escape through the door


Ending 17:

- go to Liza and talk to her

- get killed by the ghost

(ONLY after you got one of these Endings you are able to get Ending 18 or 19 in your next run)

(After you entered the mutated room at leat once you can get these Endings)
After one of the Mutated Endings (16/17):
When you start a new run your character will remember something and the screen will flash red

Ending 18:

- Julie has to STAY in the room

- get the knife it's now bloodstained


Ending 19:

- Julie has to LEAVE the room

- get the knife it's now bloodstained

(You have to get back to the Mutated Room inbetween these Endings)

AFTER you get all other Endings you can unloack the Last and True Ending

Ending 20:

- go to the message bord next to the plant at the far site of the room

- examine it (it should contain all but one Flag [1-19])

- talk to Julie select [chat] and just keep on chatting (repeat several times)

Enjoy the End of the good story and finish this entertaining little game ^^

To unlock the Secret Achievement you have to finish the game first and have gotten every Ending.

Your Goal is to restore the room !

HINT:

You have to get a blank mind / a clean sheet of your memory to restore what isn't there anymore

SOLUTION:

Go to the games install folder normally:
[C:\Program Files (x86)\Steam\SteamApps\common\ConfessMyLove\System]
delete your save-game [System.rvdata2] and start a new game