How To Survive A Yandere Situation?

 My eyes felt heavy.

 My body felt very stiff.

 Slowly my eyes opened, and in front of me was the ceiling ornament that I remembered.

 It felt very nostalgic, and it looked like the ceiling of my room when I was little.

 My memories overlapped a little and my head still hurt.

 I moved my hand a little, but it felt very heavy.

 "Munya~ munya~ Onii-sama..." I heard a small, cute voice beside me.

 Reflexively, I tilted my head and found a familiar figure!

 A figure that was so cute but scary!

 Instantly, I felt an incredible pain in my head. Like a memory of pain that was activated when I saw my cute little sister.

 Oh! I remember now!

 This pain!

 This fear!

 This feeling of helplessness!

 I have been suppressing all this pain for years.

 That's because she was the one responsible for my previous death!

 My cute little sister...

 She killed me so casually after killing all the members of her family. A tragedy that was created because our father refused her request to marry one of the commoners.

 He was not an ordinary commoner.. that's because he had extraordinary swordsmanship and magic resources. In short, my little sister and this person were in the same class and a little bit of love appeared between them.

 But please.. don't bring me into the death of this family again.

 Our family is a noble from the Flora Kingdom and my father holds the position 'Duke of Flora' and that position could not save him from the massacre carried out by my cute little sister.

 I still remember that day, right under the pouring rain and lightning strikes. The residence of Duke Flora experienced a great event after dinner took place. I do not understand the condition of my cute little sister but one thing is for sure.. at that time she was filled with a figure I did not know...

 A figure who smiled so happily with a blood-stained knife in her hand.

 The beautiful hum of a song that came out of her mouth after clearing several people who were blocking her way became the accompaniment to the death of our family.

 And her sweet words like, "It doesn't hurt, Onii-sama. Just let me kill you... slowly... and happy."

 What kind of nonsense is that?

 That smile and hum of a song were the disaster that happened that night.

 The dance of her footsteps walking on a pool of blood was enough to put a deep trauma in my head.

 That night, I died in a pretty epic state.

 A wound on the neck, a sting from sharp glass, getting hit by an iron door, falling protecting myself on the stairs, and then falling on a cactus just to escape from my little sister.

 Isn't it epic? A complete package for a horrible death.

 I was very sure that I died at that time!

 But..

 Why am I here?

 Why?

 How come?

 Someone.. can someone explain it? Beside me is the Goddess of Death who is sleeping soundly!

 After I looked back, my cute little sister was in pretty state. If only she had been a cute girl without that scary side. What would have happened to this family?

 I thought back to that night.

 Was there a way to avoid that incident?

 I had suffered enough in my previous life with my father's harsh training.

 And now I was repeating it?

 Feeling that torture again? Eh, it wasn't torture.. more like mental pressure.

 Yes, it was because of the demands of an heir to the throne of the 'Duke of Flora'.

 Definitely! I want to enjoy the easy mode of life this time!

 Enjoy the taste of a normal life!

 Suppress the development of the devil hiding inside my cute little sister.

 Developing the territory of those insolent subordinates who played around using the name of 'Duke of Flora'.

 And...

 What is this? Why is my list of things to do getting longer?

 Oh! I want to experience proper love! I'll not die before spring comes into my life!

 Most importantly... I want to be safe from my little sister's attack!

 [...]

 The morning light that greeted my face felt so warm.

 I could feel my eyelids turning black, it felt like I hadn't had a nightmare that felt as real as this for a long time.

 Oh, let me get this straight...

 It was indeed a nightmare!

 My cute little sister slowly moved, her small movements covering her face from the glare of the morning sun that looked so elegant and charming.

 If only she were a normal little girl!

 I could feel her tight embrace in my arms all night long. That's not normal strength for a little girl like this! It felt like I was locked in iron bars and couldn't move freely.

 Seeing the beauty of her cute face, my hand unconsciously stroked her tiny cheek. Very soft and supple for a little girl.

 If I look at her body size, I think I'm back to my age of 10 years old.

 My sister and I have a one-year age difference. Yes, there's nothing special about me. All I know right now is that she's just an abnormal little girl with extraordinary strength. In contrast to me who is just a weak successor to the family.

 I pulled those adorable cheeks until the bright red gaze was in front of me.

 This morning, my body shivered not because of the cold air but because of the sharp red gaze filled with nostalgia. A gaze where she looked at someone like worthless trash.

 "Muuu~ Onii-sama?"

 However, the red gaze in front of me was more friendly and welcoming.

 Hey! Where did that scary gaze that killed me go?

 "Good morning!" with this awkward tone, I dared to greet her.

 "Good morning, Onii-sama" my little sister smiled.

 A smile that I don't know when I can see again, that smile felt so warm and comfortable.

 Of course, it was the opposite of the smile that night.

 I understand now, she is just a normal girl. Something has changed her into a sweet-bodied devil that night.

 But what caused it?

 I need to find out this for my survival!

 For the family? Let's put it in the last optional plan.

 My life is more important for now!

 "Onii-sama.. why are the areas under your eyes dark?"

 "Ah... I just didn't get enough sleep"

 The red gaze slowly turned blood red. At that moment my body shook violently after seeing her thin, scary smile in front of me.

 "Fufufu~ Onii-sama.. not getting enough sleep is unhealthy" My little sister with her small laugh started to stroke my head.

 I felt a little bit of an overwhelming feeling of sleepiness and it made my body feel weak. My eyes felt heavy and I wanted to fall asleep.

 I slowly began to fall asleep in the melody of her caress until a knock on the door woke me up.

 "Tch!" I indirectly heard my little sister say that sentence.

 Huh?

 Since when did she have this kind of personality?

 Has she been this scary since birth?

 Why is this?

 What's wrong with her head?

 "Karl-sama.. Chiyuki-sama.. please allow me to enter the room."

 I almost forgot.

 Right now, our room is indeed one. My little sister Chiyuki and I shared the same room and separated after I was too busy undergoing training as the successor to the head of the family.

 If I think about it, I rarely met my little sister after that training.

 I think I should pay more attention to my little sister.

 If dogs can be raised with affection, humans can too, right?

 Okay, let's try with the affection that is common among siblings.

 I slowly dared to stroke my little sister's slightly messy hair. A sensation that was very difficult to feel entered my heart. Between fear and addiction to seeing the sweet smile created by the caress of my hand.

 A sweet smile washed my eyes and the beat of a cheerful little song began to surf in my ears.

 I think I have succeeded in fixing her chaotic feelings.

 Seeing her smile, I accidentally kissed her cheek.

 The chewy and soft feeling made me bite it a little. When I let go, I could see all of her tiny cheeks that were bright red.

 Then.. slowly. I could see her face also turning red.

 "MOOOOOOO~ Nii-sama BAKAAA!!!" Chiyuri then buried her entire face in one of the pillows and rolled around while covering her face.

 What is this?

 My little sisterr has this kind of weakness.

 I guess...

 I have to find her other weaknesses to straighten out his character and behavior.

 To prevent the destruction of this family and the loss of my life!

 I will become an older brother who is one level above her!

 [...]