There, the lawsuit alleges, Levine fondled the boy's penis.
The alleged victim, now 48, says that the abuse began when he was 15 and when Levine was 41.
The unidentified man describes how he met Levine at the Ravinia festival when he was four years old after his parents took him backstage to meet the conductor.
'This is a tragedy for anyone whose life has been affected.'An email to Levine's manager seeking comment on the accusations was not immediately returned.
The accusations against Levine, among the most prominent classical music conductors in the world, are the latest in a stream of sexual misconduct charges involving high-profile men in entertainment and the media that have rocked the nation since accusations against film mogul Harvey Weinstein were reported in October.
At the same time, the lawsuit states, Levine would give the boy gifts - with an alleged total value of $50,000 - and also wrote him a college recommendation later. By then, the pair would occasionally dine together at New York City restaurants near Lincoln Center.