Background: Cybersex addiction is a sexual addiction characterized by virtual Internet sexual activity that causes serious negative consequences to one’s physical, mental, social, and/or financial well-being. Previous studies have mostly addressed cybersex addiction in heterosexual males. Purpose: To describe a case report of a 26-year-old gay man suffering from a cybersex addiction. Methods: We use Griffiths’ model of the common components of addictions. Results: We reveal this case report of cybersex addiction possesses all of six components universal for addictions. Conclusions: In light of the increasing prevalence of various behavioral addictions (especially, Internet addictions), clinical psychiatrists should be aware of the cybersex addiction phenomenon.