On July 26, G-Friend appeared as guests on MBC FM4U's 'Ji Suk Jin's 2 O' Clock' radio show.
During the broadcast, DJ Ji Suk Jin asked Yerin about her interest in working with the former contestants of 'School Rapper'. Yerin responded with, "I like programs like that, so I watched with a lot of interest." She continued, "Rap represents another me. To be honest, I've never learned rap professionally and I can't really rap well, but it's still fun."
She then showed off a little of her own freestyle rap for listeners! Afterward, she shared that her rapper name was MC Moksal ('mok-sal', meaning pork neck in Korean). Because "I like pork neck in my kimchi jjigae", Yerin explained.