Title of that Shounen Ai

Guys I can't remember the title of this shounen ai where in MC is an uptight guy who wears a black ball cap and causes ML to fail in one subject. So ML decides to annoy MC now that he couldn't graduate due to that failed subject. All I remember is ML starts wearing a red padded jacket and eventually all his stuff is red just to annoy MC. It's a manhua. Help me guys I can't sleep trying to remember the title.