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The name of the disease is congenital heart disease, which is a disease that has been contracted since birth.

To be honest, my parents are the same as me, but I have this disease.

My mother once said to me, "Liyin suffered from her own pain, that's why she told me to take good care of her"

Therefore, since I was a child, I have been intending to believe this lie and continue to take care of Reine.

I spent almost years by her side all the time.

Maybe that's what caused her to become dependent on herself.

"Mayuko, go out for a while..."

I think she may not be able to accept it for a while, Li Yin has a very bad attitude towards Mayuko.

After hearing from the nurse that she was in a good mood today, she dared to bring Mayuko to see her.

But I didn't expect that when I saw Mayuko, I became very excited.

I fed the medicine into her mouth and let her swallow it, and her condition was relieved a little.

I asked her in a concerned tone, and she relaxed as she gently patted her chest.

"Do you feel any better?"

"Why do you want to save Liyin? Didn't you bring that woman to see Liyin just to make Liyin die?"

Li Yin looked at me with resentful eyes, and could feel the anger coming from her.

"Clearly promised to be with Liyin all the time... Liyin is so in love with Ouni-san...Clearly Liyin can give everything for her brother, why did you find that kind of woman? Why? Why? Why? Why? Why? Why? Why? Why?"

Li Yin kept repeating this 'why? ' three words, and then looked at me with out-of-focus eyes, which made my back not feel cold.

"..."

I took out the folding chair and sat beside her hospital bed, putting my hands on my thighs and clenching my fists.

He didn't say anything, he just hesitated and didn't know what comforting words to say.

"Really? So that's how it is!! So my brother also fell in love with that woman, so that's what I said, with Liyin's current physical condition, even if he likes my brother. But my brother...why did he leave Liyin? What about Yin? Whether it's her parents or Ouni-san, they've all stayed away from Liyin, and Liyin didn't like it because she got this kind of disease..."

"Aha……"

I sighed deeply, feeling very helpless about the misfortune that befell my sister.

"I wanted to spend my whole life taking care of you until you were healed, but already..."

"fraud……"

"Eh?"

Possibly aware of her low, intimidating voice, I leaned over to look at her.

However, she lowered her head and buried her slightly gloomy gaze in her long jet-black hair.

"Liar, liar, liar, brother is a big liar!"

Regarding this, I really can't fight back, after all, I broke the agreement first.

Chapter 2 Before his death

Recalling the things I promised her in this ward when I was a child

My sister became very poor when she was about five years old, and then entered this hospital.

At that time, my parents and the others went through the hospitalization procedures, and because I was still young, I couldn’t replace the adults to do this kind of thing.

I can only stay in this room, accompany my sister who is crying while sitting on the bed.

"Perhaps Liyin couldn't leave this ward since she was destined to have this disease..."

As she talked, Liyin, the girl who had played with her since she was a child until she grew up, was constantly shedding tears.

When I was a child, I probably thought that she was my sister, and I didn't like girls crying in front of me, so I reached out and touched her head directly.

"Don't...don't cry, that...if you're going to be hospitalized, I'll accompany you...I'll play with you every day!"

When I was young, I turned my head awkwardly, not daring to look directly at her cheek.

"really?"

I saw Li Yin moving her hand away from her tears, her wet blue eyes staring at my cheek, while I stroked her little head and patted my chest.

"Ah, a man will never break his word!"

"Then...it's an appointment..."

Liyin carefully stretched out her little finger, trying to pull the hook with herself.

"About... an appointment..."

I also stretched out the little finger of my right hand to hook her little finger.

"Those who break the agreement will have to swallow a thousand needles..."

"It always feels so scary..."

As soon as she heard me say that, she burst into laughter with a puff, and a nice laugh came out of her mouth.