Yoon Joon

Yoon Jun is a pharmacist who runs a pharmacy. He lives in a tiled-roof house and generously provides a small room to the Shim siblings, who are without a home. He grew up under strict parents and has deep connections with Shim Woo-joo, forming a bond where they share all their secrets as a best friend and familial-like relationship. Additionally, he maintains friendships with Hye-seong and Ji-gu.