My Sister Is a Heavenly Venerable

His older sister, missing for four years, returns from the immortal realm and awakens inside the body of a rich heiress. The two, who aren't related by blood, are mistaken for a couple, and Chen Ze's unconventional life as a son-in-law begins...

(A good-for-nothing older sister and her prodigy younger brother embark on a bizarre life of pretending to be a couple and getting into real trouble.)