The Best Sleepovers (JohnBro)
If you don't like the ship, don't read it.
Basically the plot is Dave has moved, with Bro, to Washington. John gets to spend the whole first week of summer at Dave's house. John meets Bro. John develops feelings. Bro gets seduced.
Not to mention the fun times that Dave will have with John's dad when he goes to John's place. ;3