Smooth
It's a Valentine's Day miracle! This episode is being published 13 years to the day after this episode of The O.C. takes place. Also Tyler got a mic stand, so I think this is a really high quality show. The boys talk about sex, betrayal, and how cool the Newport Beach denizens are for being poly.
Episode description from Hulu:
"Ryan's ex-girlfriend shows up to cater a dance and ruins his attempt to reconcile with Marissa; Seth and Summer decide to take their friendship to a new level; Jimmy has a secret admirer."