On the March 24 episode of 'School Rapper', the contestants held a one-on-one battle to enter the finals. 

Mark chose Bang Jae Min for the battle, and explained, "I think he has a similar vibe to me when I see him on stage. I want to hold a stage with him together." On the other hand, Bang Jae Min has revealed in the past that Mark is the one contestant he doesn't want to battle with. 

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The feisty battle started. Mark successfully completed his stage and Bang Jae Min also surprised with outstanding performance even after forgetting his lyrics, which he overcame with freestyle rapping.  

Ultimately, the votes gave the victory to Mark. The scores read 57:43. Mark will now be heading to the final round. 

You can watch Mark and Bang Jae Min's one-on-one battle below.