Being Frail Doesn't Stop Me from Being the Strongest

My name is Chika. My surname isn’t important, but if you really need one, it’s Inoshita. I’m an ordinary shut-in author who writes horror stories, and they sell pretty well.

I’ve been reincarnated into this world for many years now, and life has been pretty pleasant. My parents divorced early, so I don’t have to endure being called “sweetie” at an age when I’m already old enough to know better. They both feel guilty about it, so they send a lot of money to my account every month. Can’t complain.

My precious snake and I have a pretty good life together. My only regret is that my darling little brother wasn’t reincarnated with me. I think about him almost every day and hope he’ll show up soon. Even if he’s old enough to be my son, I really don’t mind.

Then, on a calm and peaceful day, a pink-haired high schooler suddenly snatched the limited-edition peanut ice cream right out of my hands. As I watched, he gobbled it down in one bite and said with a look of disgust, “Why is your taste still so weird, Sis?”

I knew it. My little brother, Ryomen Sukuna, had come back to find me.

A few things to know:

1. Big Sis isn’t exactly a good person.

2. Big Sis is seriously strong.

3. Big Sis and Sukuna were biological siblings in their previous life.

4. Big Sis really loves Sukuna.

5. The pairing... is very likely to be Sukuna. They aren’t biological siblings in this life, after all.

Theme: I’m the big sister, after all.