Yeon Da-eun (played by Kim Ga-eun) is a protagonist in Goodbye B1.
Park Kyung-hye (played by Jung Yi-seo) appears in Goodbye B1.
Jung Hyun-joon (played by Jung Jun-won) appears in Goodbye B1.
Father (played by Lee Dae-yeon) appears in Goodbye B1.
Jang Jeon-ja (played by Lee Ji-ha) appears in Goodbye B1.
Lee Yeon-hee (played by Lee Yeon) appears in Goodbye B1.
Mother (played by Cho Ryun) appears in Goodbye B1.
