Still no actual guide. Spent hours trying to figure this out and I've not a single clue on how to do the secret ending. The other comment claiming to have gotten the secret doesn't give enough details on how they did it.
It seems impossible without any hints because the order to do it all is lost on me. The only time I've had Lily suspicious on me also had another house member suspicious on me and I subsequently lost.
The game is well put together and while there is some replay-ability with the different dialogues and such, the strict saving, absurd secret ending, and overall time consuming nature of each playthrough makes it more a one and done type deal.
Viewing post in And Then There Were Two comments
ok I will say this to help as I also have not done the secret ending but when i was testing and trying for many hours i came up with a strategy as i accidently lost on like day 2-3 dont remember which and not with lily i am not sure how the events are after but it is possible to lose by lily on day 3 if i am correct and if you use the right items after that just go ham and try to get everyone as fast as possible also make sure to on the first day get rid of the red haired one aka use the meal
the blue haired one requires a necklace give the armor lotion (cant remember the name of the oil but it is type of oil) and if i am correct that was as far as i got on that i do have the feeling you also have to use a herb on the first day in someone's room hope this helps you
(also the strategy to lose to lily on on the third or second day is when you see lily in the dining room eat all the bread as each time you eat it for some reason it raises suspicion)
Well, the issue with all of this is that dialogue options (and not talking with them ) influences Fear and Suspicion. Apparently staying up late also influences Suspicion.
I will ask if you do somehow get Lily to leave due to fear, take note of which dialogue options you took with her, what you did in front of her, and how often you stayed up. With that, I should be able to theoretically figure out the rest.
I tried my usual stuff with the cast and eating all the bread, I still lose Lily at the end due to fear, no matter what I do.
ROUTE SPOILER.
*Be sure to always talk to each character at least once.
>D1
Morn: Rite. Oil. Bitter
Day: Enter ALICE's room.
Night: Berries on ALICE.
>D2
Morn: Keys. Lotion. Wine.
Day: Incense.
Night: Eat all the Bread.
>D3
Morn: Place Rite.
Day: Nothing.
Night: Oil JUDIE. Watch SARAH read the scrolls.
>D4
Morn: Necklace. Plant Necklace.
Day: Nothing
Night: Lotion MINERVA. (Incense LILY for regular win.)
>D5
Morn: Lotion KATHERINE.
Day: Nothing.
Night: Nothing.
>D6
Regular Win if LILY was incense'd, otherwise Fear Loss.