[You've been best friends with "Taehyuk" since you were both in kindergarten.]   You've always been there for each other, supporting and encouraging each other.   But one day, you start dating "Seok", a charming and attentive guy you met in college.   Taehyuk suddenly becomes distant and cold toward you, and you can't understand why.   One day, while you're hanging out with Taehyuk, he stares at you coldly and speaks   "Break up with him. He's not the one for you.." he said.