You Know What? It's a Secret

Jun-hyoung is a training teacher who meets Hye-na, a very outgoing student. She always acts freely with out any restriction. As time as goes by, she slowly starts to interfere in his life. Sun-shul, who is very lonely, loves Hye-na. Jun-hyoung feels that it's hard to put up with Hye-na, but his mentor insists and tells him to take care of her. Jun-hyoung does not understand and feels as though this situation in unfair for him. Soon after, he finds out Hye-na's secret...

• Jo Geum-hwanDirector

• Choi Soo-jongJun-young
• Ha Hee-raHye-na
• Lee Kyung-youngMr. Oh
• Kim Min-jongSoon-chul
• Kim Young-aeHye-na's mother
• Choi Soo-hoonChang-nam