Samuel Kim won't be attending high school.
He graduated from his middle school this past February 2nd, and had been talking to his family about attending high school. His label Brave Entertainment revealed, "Last year, because of 'Produce 101' season 2, his solo debut, and his album promotions, he found it difficult to attend school. He decided to be homeschooled so he can focus on his studies and his activities as a singer separately."
Best of luck to Sam!