Ten-year-old Mo Yimin has transformed from an orphan to the adopted son of a wealthy businessman. Yang Dichen has a playmate or younger brother who is 2 years younger than him, and he is almost inseparable.
Five years later, Yimin was fifteen years old. Dichen walked past her father's study, with the door ajar, and saw the scene in front of her. From then on, Dichen felt disgusted with Yimin.
There may be some plot
First let me state that the two protagonists are not biological brothers.