My Invisible Ex-BF US

After 7 years of dating and 3 years of living together, Il-sang Jeong told her boyfriend Boim Ahn ("Ahn Boim" means "invisible" in Korean) that she was breaking up with him, and yelled at him not to be seen in front of her. And then he turned into an invisible man.
Their relationship is over, but now invisible her ex-boyfriend "Boim Ahn" won't move out of the house where they have lived together and the two end up living together in a contract. Il-sang Jeong starts dating "Jae-gun Joo", a successful man, and "Boim Ahn", who is jealous, begins to interfere Il-sang and Jae-gun with his invisible body.
Jae-gun Joo is the perfect man she had dreamed of, but his values and sense of humor are so different from hers and she doesn't feel comfortable around him. Meanwhile, her ex-boyfriend Boim Ahn is shameless and makes her embarrassed, but she feels so comfortable around him. Il-sang ends up falling in love with Boim Ahn again. The social presence of Boim Ahn, who he thought only his appearance had become invisible, fades away, and he becomes the one who did not exist in the world and is gradually forgotten in the memories of people.