The episode answers that Seo Dong-ju and Yeo Eun-nam are not siblings. Buried Hearts episode 12 begins with Il-do escaping the trench, injured. He sees Chu Seong-hyeon standing in front of him.

Buried Hearts episode 11 was released on March 28, 2025, on Disney+. In a further development, the episode shows Heo Il-do is the one who killed Seo Dong-ju's (Park Hyung-Sik) parents in the accident.