In "A Valid Love," a love and affair started simultaneously. Lee Soo Hyuk kissed Lee Shi Young passionately, starting a new love.

On the 4th episode of tvN Monday/Tuesday drama "A Valid Love" (script Kim Do Woo, director Han Ji Seung) broadcast on December 9th, Kim Joon (played by Lee Soo Hyuk) and Kim Il Li (played by Lee Shi Young) were startled at the sudden change in emotions that come with a first love.

Joon tried to keep his distance from Il Li but he couldn't stop Il Li's positive energy. In the end, Joon was upset at Il Li and pushed her up against the wall, threatening her.

Il Li was shocked at Joon's tough side and couldn't breathe properly. She was only able to breathe after putting his hand up to her mouth, which was a serious situation. Joon wanted to put some distance between them but seeing her eyes getting filled with tears, he was wrapped up in a strange emotion.

After time passed, Il Li thought back to how Joon had said, "I can't memorize my times table" and took her laptop to his workplace in an effort to help him. Nonetheless, he ended up getting upset.