Practice Makes Perfect by Jay Northcote
Getting experience with the guy next door seems like a great idea—until the lines blur.
Dev, a geeky first year physics student, has zero sexual experience and he’s determined to change that ASAP. After a bad time in halls of residence, he’s starting the summer term with different housemates and a new plan of action.
Ewan lives in the house next door to Dev. He’s young, free and single, and isn’t looking to change that anytime soon. When awkward circumstances throw them together, Ewan offers to help Dev out in the bedroom in return for maths tutoring, and Dev jumps at the chance.
This series just gets better and better. I absolutely loved Practice Makes Perfect (Housemates #3). The storyline of the two guys keeping it simple, convenient, and clinical until the moment it becomes more, is one I love. Highly recommended.