Red Shadows by Gaby Crumb

Sean knows Ash from all his life. For him, he has benn  always the ”little brother” of his best friend until, one morning, when he finds him in bed and he must stop denying himself the attraction between them. Love, however, is likely to arrive at the wrong time because Sean thinks only about one thing: together with its ”Shadows” and an unexpected ally, chasing revenge for the murder of their own and their parents.