Male Lead has same trauma & female lead acts as robot..

Kim Min Kyu is the largest shareholder of a financial company. He suffers from a "human allergy", preventing him from normal interactions with other people. He becomes interested in a robotic project named Aji-3 created by the Santa Maria robotic team. The team is headed by Hong Baek Gyun, inventor of Aji-3 and world-renowned robotics professor. He modeled Aji-3 after his ex-girlfriend, Jo Ji Ah, a struggling inventor that also works as a personal shopper to make ends meet.

Just when Kim Min Kyu wants to test the robot, an accident causes the malfunction of the robot's battery. Hong Baek Gyun begs Jo Ji Ah to take the place of Aji-3 and pretend to be the robot so they can get funding from Kim Min Kyu. But, Aji-3 becomes the closest thing that the lonely Min Kyu has to real contact with another person.

Male Lead similar ability. Which is the power of psychometry, the ability to read a person or an object's past through physical contact.

Going back to past for her first love. Limited chances to go back. In Operational Proposal also Male Lead go backs to meet Female Lead to propose. But He loses chance then he go backs to propose. Same as Blue Birthday there are limited number of chances to go back to past to modify present