Socialphobia is a 2015 South Korean mystery thriller film starring Byun Yo-han, Lee Joo-seung, and Ryu Jun-yeol. It was co-written and directed by Hong Seok-jae in his directorial debut, based on a real-life story that explores the social issues within internet culture among the Korean youth of the 21st century.

Byun Yo-han is a South Korean actor. He is best known for his roles in the television series Misaeng: Incomplete Life (2014), Six Flying Dragons (2015–2016), and Mr. Sunshine (2018). He has also appeared in films including Socialphobia (2015), The Book of Fish (2021) and Hansan: Rising Dragon (2022), for which he was awarded Best Supporting Actor at the 59th Baeksang Arts Awards.