Sun Woo looks like a gentle puppy, but he is actually sensitive like a cat. At his new job, he meets Hyun Jin, a tiresome boss. Even when Sun Woo tries to avoid Hyun Jin, he just can’t seem to escape bumping into him. Unable to stand it, Sun Woo calls Hyun Jin to the roof. Under the premise of following all kinds of prohibitions such as ``Not coming closer than 1m''. He declares that he can be a ``friend''. Thus begins the relationship between Hyun Jin and Sun Woo who are friends, but not friends.