Dissonance

Jeremy takes a job a year away from everyone he loves, banking on the distance being temporary and the payoff being permanent. The girlfriend who's due to follow him after graduation, the spoiled best friend, and the rebellious little sister all stay behind, and a year is a long time to trust that bonds hold from a distance.

The story follows what happens to those relationships while he's gone and how much of what he left intact actually stays that way. It's a kinetic novel, so there's no branching to manage and no choices to second-guess, just the story playing out on its own terms toward whatever it's building to. Given the setup, the tension isn't whether Jeremy stays faithful himself but whether the people he trusted did.