"Backtracking."

Gu Yi closed his eyes and started backtracking again.

(Backtracking begins!)

(You enter the living room and encounter your mother.)

(Mother: Where is your sister?)

(You: She's probably still sleeping upstairs.)

(Mother: Go wake up your sister. She has to go to school soon.)

(You walk to the staircase and shout loudly upstairs.)

(Mother frowns.)

(Mother: Can't you go upstairs and knock on her door?)

(You: Can't be bothered.)

(Footsteps come from upstairs, but you don't see anyone.)

(Shortly after, your father comes downstairs.)

(You sit at the table for breakfast, and there's an empty seat that you assume belongs to your sister.)

(Father: Let's go. I'll take you both to school.)

(Mother: How about going with me?)

(Father: Who do you and your sister want to ride with?)

(You remain silent.)

(Father: Who do you want to ride with?)

(You: Doesn't matter.)

(Father: Don't say 'doesn't matter.')

(Father grips the chopsticks and pierces through the table.)

(Apparently, your father is also not an ordinary human like your mother.)

(You: Then I'll ride with you?)

(Father nods.)

(You follow your father outside.)

(You get into your father's car.)

(The car suddenly catches fire.)

(You try to open the door to escape.)

(Your father's face is burnt to charcoal.)

(Father: Why didn't you fasten your seatbelt?)

(Your father helps you fasten the seatbelt.)

(You can't free yourself and can't open the door.)

(You struggle and scream.)

(You are burned to death.)

(Backtracking ends!)

"Unlocked another method of death... Should I try riding in Mother's car instead?"

Gu Yi frowned.

This time, the pace of the dungeon is noticeably faster, and there were no obvious hints given to him at all.

So far, Gu Yi had only obtained a mobile phone, a vague diary, and a lease agreement for the old mansion.

As soon as he entered the living room, the plot immediately started without giving him any chance to search for clues.

Regardless of the situation, in the previous hospital dungeon, there would at least be clear rule prompts when switching scenes.

Still,

I possess the talent to deduce endlessly.

If it were any other adventurer, encountering two death flags consecutively upon entering the living room, where would they have a chance to survive?

Gu Yi took a deep breath. The difficulty of this dungeon had clearly increased.

Too little information.

Too many dangers.

Too little time.

The pace was too fast.

"Let's try riding in Mother's car this time."

(Backtracking begins!)

(You sit at the dining table.)

(Father: Who do you and your sister want to ride with?)

(You: Let Mom take us to school.)

(Mother nods.)

(You finish breakfast.)

(You get into your mom's car, and she reminds you to fasten your seatbelt.)

(Mother starts the car, steps on the accelerator, and rushes towards a small pond by the roadside.)

(You: Mom, the car is heading into the water!)

(Mother pays no attention.)

(You try to control the steering wheel, but your body is too weak, unable to match your mother's strength.)

(The car plunges into the water.)

(You desperately struggle and knock on the window with your hand.)

(The car gets submerged in water, and your mother continues to hold the steering wheel as if nothing happened.)

(You feel suffocated.)

(You die.)

(Backtracking ends!)

"Neither option is correct?"

Gu Yi stood in place, afraid to open the door.

Instead of rushing into another backtracking, he carefully pondered every detail of what just happened, analyzing the reasons behind triggering the instant death plot.

Firstly, he couldn't see his sister, which is an obvious contradiction.

According to the wording in the diary, "I" should be able to see the sister, but why couldn't he see her during the deductions?

Furthermore, the lease agreement for the old mansion mentioned hearing footsteps when going upstairs. Does this sound refer to the invisible sister?

In that case, do the parents also hear the sound of footsteps?

Do the rules mentioned in the lease agreement only apply to him or to everyone in the house?

Or perhaps...

Could it be that the parents also can't see the sister, but they pretend that they can?

If the sister truly doesn't exist, then why would the parents still send her to school?

Are the other people in the town unable to see the sister as well?

"No, it's impossible. This assumption is too far-fetched, so... the one in the family with cognitive impairment is me?"

Gu Yi temporarily rejected his own thoughts.

At present, there isn't enough evidence to prove anything, so Gu Yi can only temporarily assume that he has cognitive impairment.

"Once I make this assumption, the problem can probably be solved.

When the Father asked, 'Who do you and your sister want to ride with?' I never asked about my sister's preference, which triggered the death flag.

Even when getting into the car later, I never let my sister get in.

That should be where I made a mistake."

To confirm his hypothesis, Gu Yi began backtracking again.

(Backtracking begins!)

(You sit at the dining table.)

(Father: Who do you and your sister want to ride with?)

(You look towards the empty seat on your right.)

(You: Who do you want to ride with?)

(You pretend to see your sister, but there is no response.)

(Mother: Forget about your sister. Today, you just go with me.)

(You finish breakfast.)

(Mother starts the car.)

(Instead of sitting in the front passenger seat, you open the back door and wait for a while.)

(You hear a series of footsteps and look towards the empty air in the backseat.)

(You: Hurry and sit properly, remember to fasten your seatbelt.)

(Mother: You go ahead and get in the car. It doesn't matter if you fasten your seatbelt in the back.)

(You: Okay.)

(You get into the car.)

(Mother drops off your sister at Huan Dao Elementary School and takes you to Huan Dao High School.)

(You step out of your mother's car.)

(You terminate the backtracking.)

"Phew... Finally found the key to the problem."

Gu Yi stuffed his phone into his pocket, put the diary into his backpack, and then opened the door to leave his bedroom.

His mother looked at him impatiently and complained in a low voice, "Why did you wake up so late?"

"I couldn't find my socks, so it took me a while."

"What about your sister?"

"She should still be sleeping upstairs."

"Go wake your sister up. She's about to be late for school."

Gu Yi nodded and walked to the staircase, shouting loudly, "Wake up! Otherwise, you'll be late for school!"

Gu Yi's voice was highly penetrating.

His mother covered her ears and looked at him disdainfully, "Can't you go up and call her?"

"Too lazy to go."

Gu Yi shook his head and sat at the dining table.

Tap, Tap.

Footsteps could be heard from upstairs.

Gu Yi turned his head to look, but no one came down from upstairs.

His mother looked at him with a furrowed brow and said irritably, "You are just sitting there like a fool. Don't you know how to get the dishes and chopsticks?"

"Yes, right away."