EXO, consist of 12 boys that look more like a football team rather than a group of best-friends. They have known each other since they were in elementary school, so they are so close that there are no one who can separate them. Not until a girl named Park Hye Nim came into Exo's life. A pretty, smart, rich and well-being girl that just moved into Korea. Since she came into their life, they got into fights and conflicts and they are not even sure what's going on into their friendship. At that time, 2 person left Exo without a clear reason. That was a mental breakdown for Exo, and now they are questioning their own friendship again. "Are we still the Exo that we used to be? How can Hye Nim broke our friendship?"