My Mortal Enemy Became My Military Training Instructor

I, Lin Xingchen, have had one goal since I was a child - to defeat Shen Du. The "other people's kid" my mother calls me, who lives next door to me and always gets the first place in exams, is my biggest imaginary enemy in life. I worked hard for the college entrance examination and finally got into the same university as him. I looked up to the sky and screamed: Shen Du, your good days are over! Then on the first day of school, there was a military training mobilization meeting. His name was clearly written on the list of instructors. I comforted myself: if you have the same name, it must be the same name. Until that familiar figure stood in the center of the training ground, wearing an instructor's hat, looking at me with a half-smile. Later I found out that he took the initiative to apply to teach new students in order to be my instructor. He gave up a better school just to be with me. He has been a "rival" for more than ten years just because he didn't know how to tell me—— He likes me.