This is a good end to the series, I think. It's not quite as intense a story as Nick & Luka's (which is my favorite of the series), but Surya and Em do have their miscommunications. 
 Surya acts on his attraction to Em during the first Moonlight/Luck tour and then runs out before the morning. Neither Surya nor Em can get that night out of their heads, even a year later. When Luck and Moonlight talk about doing a collaboration album and tour, Surya is against it because he doesn't want to have to avoid Em, Luck's manager, again for the whole time. So Em travels to London to talk Surya into it, and against his "better judgment", Surya agrees. And then they hang out around town, and then they have some drinks, and then things get messy. And this time it's Em who walks away, not because he wants to, but because he thinks he's making it easier for Surya to pass off as "no big deal", when it really is. 
 There's tension between them, and Surya finally talks Em into being friends again. But there's friends, and then there's Em and Surya, who can't stop talking or wanting to touch each other, even though Em looks at it as unprofessional on his part. But eventually tension boils over. And they're happy for a little while, until Surya's family finds out and lashes out at Em as "the cause" of their son's dishonorable behavior. It's too much for Em to bear, in addition to his own family troubles stemming from his grandmother's death and her will (which leaves everything to Em, much to his cousins' ire). Em leaves, and Surya doesn't know any longer if he'll be able to trust Em to be there when he needs Em the most. 
 It's not as flashy as Nick's story, nor as heart-breaking as Jesse's (and Shane's), but it's similar in that they're not on the same page, and they're going to have to get that way before they'll get to their HEA. 
 I'll always enjoy reading about any of the Lucky Moon guys. =)