Unexpected Heartbeat: My Scientist Boyfriend

It was supposed to be a joyful Christmas Eve, but a sudden explosion destroyed the original beauty of the city, but the only survivor turned out to be a mentally retarded man! However, this person hides an unknown secret. The strange ID card, the missing address, and the mysterious connection with the robot are all hidden behind him. He didn't tell everything until he was accused of being a murderer. It turns out that this is an intelligent secret composed by robots.