My Stepbrother (MM Romance‪)‬

After his mother remarries, Ian Ryder finds himself spending the summer at a beachside mansion. It's the kind of thing he might have dreamed of, but there is a major complication—his gorgeous new stepbrother.
Tortured by a family tragedy, Lucas resents Ian and his mother. He can't accept that his father has moved on and remarried.
On top of that, his attraction to Ian is a shock to him. Until he met Ian, Lucas always thought he was straight. But the heat between them is undeniable. He can't stay away from Ian, and Ian can't resist him. No matter how rough or arrogant Lucas is, Ian can't help falling for him.
When their secret relationship is revealed, the fallout sends Lucas back to his old life and Ian is devastated. Will Lucas come to his senses in time, or will he let Ian slip away from him forever?