The Perfect Crightons [manga] Series by Nanao Hidaka, Penny Jordan

What will happen when they appear together at a masquerade?The moment successful lawyer Tullah met rumored playboy Saul Crighton, she could see why women were drawn to him, but she refused to be enraptured by his charm. Just when she thinks she has evaded his grasp, she finds out he’s her new boss! Now, in order to stop a poor young girl from falling in love with Saul, she has to pretend to be his lover. What will happen when these two appear as a couple at a masquerade?