The sickly little sister wants to turn her bad brother into a cauldron

Single female lead + no system + early love affair, strong and love affair in the later stage. Su Hang traveled to the world of immortal cultivation, which is divided into two schools: traditional immortal cultivation and urban immortal cultivation. Su Hang passed the tribulation in a few years with his extraordinary talent, but his bad luck made him fail and he lost all his skills. Fortunately, he had a pure and sweet little junior sister by his side. But she was easily jealous and turned evil. "Brother, I like you so much, become mine~" The little junior sister licked her lips and smiled evilly. ...