From the Start, My Moonlight Said Goodbye, and I'm Five Realms Above My Sister

When the girl who loves him is forced into a political marriage, and his sister, the reincarnation of an emperor, blames him for giving up on himself, Ling Qing can only endure it. He knows that in a high-martial world, the weak don't even get a chance to speak. He chooses to slack off at home and drink himself into a stupor every day, until one day the Sister-Success System appears, automatically raising his cultivation to five levels above his sister's! In the face of strength, every crisis vanishes without a trace.