On June 28, 2018, a Ttong Ttong Concert was held at Duru Middle School in Sejong City for first-year students, sharing stories about life in North Korea, the process of defecting, and settling in South Korea.
Even after the lecture ended, students from Duru Middle School's Unification Club and other interested students gathered to ask questions,
spending time learning together about the reality and human rights situation in North Korea.