Actress Ku Hye-Sun has dropped out of currently airing MBC drama series “You Are Too Much” due to a serious medical condition. Recently, while on the filming set, Ku Hye-Sun experienced dizziness and difficulty in breathing and was sent to the hospital emergency room. She was diagnosed with a serious allergic reaction aka Anaphylaxis which sometimes can even be fatal. Ku Hye-Sun is currently hospitalized and will undergo long term treatment, along with rest. Consequently, on March 23, 2017, she informed the production of “You Are Too Much” that she has to quit the drama series. The drama series team has cast Jang Hee-Jin to play Ku Hye-Sun’s character.