(COMPLETE) Draco drinks a potion that makes him know if a person is lying, and Harry, apparently at fault that Draco is this way, is forced to 'help' him with the effects of the potion. For the first time, they deal with each other with no lies to hide behind. HPDM RWHG BZNL SSRL

When Harry was left on the Dursley's doorstep, Petunia quickly realised he couldn't stay. Where else to leave him but with the very person who'd first lured her sister into the magical world all those years ago? With a very different upbringing on Diagon Alley, it's not exactly the same Harry that arrives at Hogwarts ten years later.