The cast of 'Youth of May' gets competitive as they answer quizzes about each other.

'Youth of May' is the new romance drama about the fateful meeting of Hwang Hee Tae, played by Lee Do Hyun, who is a medical student, and Go Min Si will play Kim Myung Hee, who fell in love amidst the whirlwind of events.

The new video of the cast shows the actors asking and answering questions about each other. Lee Do Hyun started the quiz by asking how long it was since he last saw his dog, Ga Eul.

Lee Sang Yi correctly answered Lee Do Hyun that he last saw Ga Eul on the poster shoot. Lee Do Hyun expressed appreciation that he paid much attention to him.

When it's Go Min Si's turn to ask questions, Lee Do Hyun answers the question correctly that she had become a hot topic after eating a boiled egg in the film 'The Witch: Part 1. The Subversion.' Geum Sae Rok answers the following question: Go Min Si began the dream of becoming an actor since she was in elementary.

Before her next question about 'Sweet Home' is finished, Lee Sang Yi replied, 'Ballet,' which correctly gets the answer. Lee Do Hyun also played her on-screen brother in 'Sweet Home' and was shocked that he could not answer the question.

Go Min Si asks how many times has she watched 'Sweet Home,' and the cast gets the question wrong many times before Lee Sang Yi got the correct answer. Lee Do Hyun complained, and Lee Sang Yi told him that life is all about timing.

Lee Do Hyun asked Go Min Si why she did not tell that she watched it 12 times. Go Min Si argues that she watched it eight times, and Geum Sae Rok told him to listen more attentively.