After Chi Huifeng had made a name for himself, everyone sang his praises.
During an interview, someone asked him what moment in his life he remembered most vividly.
People assumed it would be when he ranked first in the Interstellar College Entrance Exam, when he drove back the immense wave of star beasts, a phenomenon seen only once in a thousand years, or when he joined forces with the faculty to nearly wipe out the Dark Domain organization upon graduating from the Federation's Boundless Academy.
Chi Huifeng paused, then gave an answer that no one could have expected: the day his younger sister was born, when he was two years old.
What people didn't know was that this was not only the day his closest sister was born, but also the day he met his inseparable bonded partner, his comrade-in-arms, and the one-of-a-kind love of his life.
That day, he gained two priceless treasures.
~Scene break~
After Chi Huifeng formed a contract with his beloved at the age of seventeen, a System suddenly appeared in his mind. From it, he learned that this world was a completed comic, but the author's reckless decisions had led to an unbearably tragic ending. The world wanted to change the course of fate and rewrite the ending. Since he hadn't existed in the original story, however, the System accidentally bound itself to the wrong person and had no choice but to persuade (or trick) Chi Huifeng into changing the ending.
After learning that the protagonist was two years younger than him,
Chi Huifeng: That has nothing to do with me.
System: But the protagonist is the same age as your sister, and they're friends.
Chi Huifeng (reaching for his oxygen): Is Xinmu okay?
System: Who knows~
System: Besides, you can use this chance to grow stronger with your beloved and protect the people you love.
Chi Huifeng agreed to help the world. As he pondered how to change the ending without any information, his beloved took his hand and asked him worriedly if he was okay.
Chi Huifeng squeezed his hand back and smiled. "Let's set a small goal: become a Level Five Contractor first."
Content warnings:
* The love interest is nonhuman, male.
* The protagonist is obsessed with his little sister and devoted to his beloved.
* The original comic doesn't include the protagonist or his beloved; they exist only in this world.
* The story is a slow burn, and the System appears later on.
* The story becomes somewhat ensemble-focused later, with a lot of time spent at the academy.
Message: For your sake, I will be invincible.
