The System of I Am My Sister in the City

My name is Su Han, and I have a strong and domineering older sister in the late middle school!
When I was born, my sister awakened the legendary soul of brother control, so my childhood was dark, and the pain of being dominated by my sister lasted until I was eighteen years old.
That year, my sister was twenty-two years old, graduated from university, and entered the society for the first time;
That year, my sister awakened the system, and I, with the highest authority of the system, can also say, I...is the system!
"Sister Sang, are you ready to accept the pain of being dominated?"
Seeing her sister who was dancing and dancing because of the awakening of the system, Su Han smiled in his heart and thought with a black belly.
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