"Valid Love" started this week with the back-story of the relationship between Hee Tae, played by Uhm Tae Woong, and that of the young woman who would one day be his wife.

When they first meet she is a quirky high school student and he is her substitute teacher. The young woman, Il Ri, played by Lee Si Young, develops a crush on her teacher and he cannot help but like her. Fortunately he does not do anything about it.

"Even if I was a substitute, I was still a teacher," says Hee Tae in the drama. "The girl is a minor and a student. I had to stop before it got weird."

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