On the March 31 airing of 'School Rapper', the finalists prepared for their final match. The topic for the stage was 'letter'. 

Mark decided to write a message or a letter to fellow high schoolers. While in a discussion about the final stage, Mark's mentor Xitsuh asked Mark if he ever struggled due to the stereotype against idol rappers. 

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Mark answered, "Honestly, I felt it a little in the beginning. It was hard because of that perspective." And he added, "That made me practice harder and changed my mindset."