Someone I used to know by Paige Toon/ 2021 release

At fifteen, George is the foster brother Leah never asked for. As the angry, troubled boy struggles to come to terms with his circumstances, Leah finds herself getting drawn closer to him. Theo’s wealthy family have mysteriously pulled him out of boarding school and he’s now enrolled at the local state school with Leah and George. When their worlds collide that summer, the three teenagers form a bond they believe will be unbreakable. But life doesn’t always go to plan...