High school can be hard but it may be more of a challenge for those who set their sights on a performing arts career.

While many performers successfully manage both, several kdrama stars found that pursuing a performing arts career, and in some cases, living the dream, interfered with what high school required.

Seo In Guk, who appeared in "The Master's Sun" and the film "No Breathing," recently confessed that by middle school he was already serious about pursuing his dream to become a singer.

He did not devote enough attention to making friends.

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