Jeremy faces a dilemma: money vs. art. Should he put all his time and effort into his music and try to 'make it' or should he be like Mark and get a 9 to 5 job to pay the bills (including three months of rent owed to Mark). Sophie is still the object of Mark's desires and he still fumbles about trying desperately to let her know how he feels.
Mark is a logical person who has a career in a credit company; has his sights set on the girl of his dreams, Sophie; and is completely uncomfortable with himself.
Jeremy, on the other hand, is more than comfortable with himself, to the point of narcissism; he falls 'in love' so often, one questions his understanding of the word or his capacity of genuine emotions; and finally, his job is an aspiring musician.
Over the series you see their antics as they try to cope with the world around them as well as each other.