Ang kwento ng "Mutya ng Section A" ay isang makulay na salaysay tungkol sa mga karanasan at pagsubok ng isang estudyanteng babae sa kanilang seksyon. Narito ang maikling bersyon ng kwento:
New parts every week on Fridays at 10PM ET ***** It's the day of visitors. But the visitors to Sin-si are unwelcomed, vengeful beom. Unforgotten animosity fills the air and rage collides, soaking the ground with blood. Seven boys take up their weapons to end this fight, once and for all. 7FATES: CHAKHO with BTS *****...