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.

Kang Hoon and Kang Joon have a bad case of sibling rivalry. Yoon Seo has an idea to wash away the anger, until an unexpected visitor stops them cold.