After Yoon Seo moves in, Kang Hoon tries to adjust to the close quarters -- and her cat. They draw up a house agreement, but that causes more tension.

Business is booming at the clinic, leaving Yoon Seo no time for Kang Hoon. A real kiss and a visit from Kang Hoon's younger brother complicate things.

Old sibling rivalries cause even more tension between Kang Hoon and Kang Joon. A dog bite and a mysterious photograhp make Yoon Seo begin to wonder.