Couchtuner Euphoria HBO Watch Series Online. An American adaptation of the Israeli show of the same name, “Euphoria” follows the troubled life of 17-year-old Rue, a drug addict fresh from rehab with no plans to stay clean. Circling in Rue’s orbit are Jules, a transgender girl searching for where she belongs; Nate, a jock whose anger issues mask sexual insecurities; Chris, a football star who finds the adjustment from high school to college harder than expected; Cassie, whose sexual history continues to dog her; and Kat, a body-conscious teen exploring her sexuality. As the classmates struggle to make sense of their futures, the series tackles the teenage landscape of substance-enhanced parties and anxiety-ridden day-to-day life with empathy and candor.