Ji Ho Joon is looking for place, but he's very picky about the water pressure. It has to be perfect. So his choice fell on Seo Jae Yoon's place, who's looking for a roommate.
Ji Ho Joon was a promising business prodigy in his college years, but he became a good for nothing son who only gave his father problems and headache. He's given a task to prove himself to his father or else.
As the new business planning team leader, Ji Ho Joon gave Seo Jae Yoon a hard time. He barraged Jae Yoon with countless tasks and berated him on every single mistake he made. So Jae Yoon got revenge on him at home, where he's on charge.
Ji Ho Joon got closer to Seo Jae Yoon. He learned that Jae Yoon has a crush on Yoo Seungsuk who shamelessly took advantage of him. Ho Joon used Jae Yoon's idea to start a business plan.
Ho Joon got frustrated seeing how Seungsuk kept on taking advantage of Jae Yoon's kindness, it put a strain on his relationship with Jae Yoon. Jae Yoon finally found out that Seungsuk was only using him all this time.
Ho Joon and Jae Yoon finally decided to date, despite being co-workers. Some unexpected cute moments at the workplace ensued. But just as their romance started to blossom, Jae Yoon found out that Ho Joon was the CEO's son.
Jae Yoon decide to leave Ho Joon and his job behind. Ho Joon couldn't get over him, he pursued Jae Yoon back to his hometown. Ho Joon had to take a drastic change to his career, if he wanted to keep Jae Yoon in his life.