Not one of the best, in the "Agency" series for JJ Massa. Vanya's complete lack of carnal knowledge is not really believable, and I couldn't help but feel that Lancelot was taking advantage of that a great deal.
Then comes the fact that Vanya must 'seduce' another scientist? It just ... made little to no sense. However, Vanya's reaction to the other scientist's touch [completely unmoved, even somewhat repulsed after a kiss] served to help balance out the coupling with Lance. ie. Vanya wasn't just reacting so strong sexually to anyone who showed an interest, only to Lance, who he cared for.
Would recommend reading it because it's part of the series, but not a great stand-alone.