Hired To Be A Fake Brother, I Unlocked A Cheat System That Copies The 5 Heiresses' Skills!

Billionaire Su Bingkun has spent years neglecting his family, leaving his relationship with his five daughters badly fractured. Desperate to rebuild the bond he lost, he hires Su Mu, a clean-background stranger, to enter the household while pretending to be the family’s long-lost heir. Su Mu soon discovers that he has an extraordinary system: by getting close to the sisters, he can unlock their professional abilities and use those skills to solve the crises surrounding the Su family. From business negotiations to personal conflicts, every challenge brings him closer to the daughters—and closer to exposing the truth behind his role. At first, the sisters distrust him and see him as an outsider. But as he repeatedly helps them through difficult situations, their attitudes begin to change in ways no one expected. How long can Su Mu keep the arrangement secret, and what will happen when family trust becomes impossible to fake?