I Am by No Means the Protagonist in This Book

Xu Yang traveled through time alone when he was sixteen years old, and the system came to him two years later. Well, it doesn't matter if Goldfinger comes later. But looking at my senior brother secretly... It seems that even with the system, I can't beat him! The first time I discovered Big Brother's secret... Tang Wanye: As your senior brother, it makes sense for me to be reborn with my memories, right? I discovered Senior Brother's secret for the second time... Tang Wanye: As I said before, as your senior brother, I have a system and common sense just like you, right? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.