The visual novel has 6 normal endings + 1 bad ending.
The info you see below is based on the Chinese guide and some parts of the TamaSaga’s translations:

Bad Ending (achievement “Choose Death”). The condition: during the first day use every opportunity to anger the kidnapper and try to escape as many times as possible, soon enough your stamina will drop to 0, and you’ll die.

Ending 5 (achievement “Sickness”). The condition: during the second and the third days anger the little sister by picking all the choices which make her big sister (the kidnapper) looks bad and distrusting. You’ll die at the end of the Day 3.

Ending 4 (achievement “Warmth”). The condition: during the Day 5, when you’re alone with the little sister, choose to attempt to flee, instead of giving up.


Ending 3 (achievement “Indelible Mark”). The conditions:
1. During the beginning of the Day 3 choose to escape.
2. During the beginning of the Day 4 choose to resist.
3. During the beginning of the Day 5 choose to escape.
4. During the Day 2 (or the Day 3) ask the little sister "Do you know where your older sister went?" then select "What if she tries to escape?"
5. During one of the conversations with the big sister ask her "Do you really think you will get out of this unscathed?" then select "I'm not interested in finding out"
6. During the Day 5 try to loosen the ropes while the big sister is sleeping.
7. During the Day 6 go to the bathroom and investigate the broken glass on the ground, cut the ropes then don’t attack the little sister but instead attack the big sis.
Remember that during the Day 5 you shouldn’t try to escape when there’s only the little sister with you, right after you've heard the motorcycle, because it’ll lead straight to the Ending 4.
Another indicator that you’ve reached the Ending 3's route is a visual glitch during one of the days (other routes don’t have it):










Ending 2 (achievement “Endless Rain”). The condition: don’t escape, try to cooperate with sisters, choose the peaceful path but don’t investigate much and try to choose one or two dialogue variants from the conditions of the Ending 3 to upset them a little. The ending takes place during the Day 6.

Ending 1 (achievement “New Beginning”). The condition: same as Ending 2 but don’t say anything mean or unpleasant to the sisters. If you live past the Day 6, then you’re fine.



Ending 0 (achievement “A Gleaming in the Dark”). The conditions:

Day 1

→ Contemplate the situation
→ How did I get kidnapped
→ Got it
→ Look away
Chat with the Older Girl
⠀⠀What's your name?
⠀⠀→ How should I address you then?
⠀⠀What do you want?
⠀⠀→ So what happens after you get the money?
Rest
→ I want to go home.
→ Drink
Observe the window, the bag and the clock
→ He probably thinks it's a scam
→ Bear it

Day 2

→ Ask for help.
→ Who is this big sis?
→ I will cooperate
Chat with Young Girl
⠀⠀Why me?
⠀⠀→ Inquire further
⠀⠀How long have you known big sis?
⠀⠀→ What if you're being manipulated?
Observe the coat
→ Try to talk
→ Sympathy
→ Answer honestly
→ Don't struggle
Chat with Older Girl
⠀⠀What's your relationship?
⠀⠀→ Stay quiet
⠀⠀How much does she know about the kidnapping?
⠀⠀→ She seems to really trust you
Observe blue cigarette box

Day 3

→ Try to communicate
→ Converse.
Chat with Young GIrl
⠀⠀You really believe in her
⠀⠀→ Do you just believe in anything he says?
⠀⠀Where did your big sis go?
⠀⠀→ Of being found out by the cops.
Observe books
→ I don't know
Chat with Young Girl
⠀⠀What do you picture me as?
⠀⠀→ Try to judge for yourself
Observe calendar and game poster
→ Just let me rest
→ Remain silent

Day 4

→ Is that so?
→ Try to cooperate
Chat with Older Girl
⠀⠀About my next step...
⠀⠀How much money do you actually owe?
⠀⠀→ Is there no other option?
Observe antique cellphone
→ Knife
→ Why don't you try to change that then?
Chat with Older Girl
⠀⠀Do we know each other?
⠀⠀What do you plan to do with that little girl?
Observe sink

Day 5

→ Rest
Chat with Older Girl
⠀⠀Why do you owe so much money?
⠀⠀→ So no one can help you?
⠀⠀You look really tired.
⠀⠀→ I told you it might spread.
Observe window in toilet
→ Ask
Chat with Young Girl
⠀⠀That Ms. Wang you just mentioned...
⠀⠀→ She's your family, right?
⠀⠀Thank you for helping me.
Observe notebook
→ Give up

Day 6

Chat with Older Girl
⠀⠀So you're sick, yet you're drinking coke...
⠀⠀Still no money huh?
⠀⠀So what do you plan to do next?
⠀⠀→ Maybe the money will come in soon.
Observer paper crane, mirror and lamp

Day 7

Chat with Older Girl
⠀⠀So I heard you were a straight-A student.
⠀⠀Do you still keep in touch with your father?
⠀⠀Her expectations...
Observe sleeping pills, curtains and chair

Thank you, Wakenworm, for providing the detailed walkthrough of the Ending 0.

On 24/06/2019 (or 06/24/2019) the developers have added one more ending. Here's tips how to get it.
1. Complete Ending 0.
2. Then replay Ending 0 and select the new and previously hidden choice (or just load a save near the end of the route leading to Ending 0 and select the choice).
3. Enjoy~