Um Da-da (Bang Min-ah) is a special effects makeup artist. She is secretly dating the popular actor Ma Wang-joon (Hong Jong-hyun), who is on the rise. As Wang-joon gets busy because of work and tired of their relationship, their seven-year-long relationship ends. And that is when Zero Nine (Young-gu) (Yeo Jin-goo), a humanoid robot who is programmed to be in love with his one and only girlfriend, appears in her life. An accidental kiss activates Young-gu and he takes Da-da as his girlfriend. As Da-da and Young-gu get closer and fall for each other, a mystery man tries to harm Da-da by threatening her to break up with Wang-joon, who secretly wants her back. Meanwhile, Diana (Hong Seo-young), the original owner of Zero Nine, comes after them to take Young-gu back. In the end, My Absolute Boyfriend is about the love with a robot who is humane and unstinting. Throughout the series, Young-gu shows what true love is as he learns about love and becomes the absolute boyfriend.
A special effects makeup artist at Real, which she inherited from her late father. A recent break-up with her boyfriend Wang-joon left her insecure about love. Upon activating Young-gu, she slowly begins to learn more about true love from Young-gu.
The original owner of Zero Nine, she is a young heiress who requested an android robot to be made due to her loneliness. She lost her right hand to a fire when she was a teenager and this led her to resent humans.
A Kronos Heaven employee who is Young-gu's creator. He acts as a brotherly figure to Young-gu, and gives him advice in dating Da-da. The damage of a previous model, Zero Seven, leads him to prevent Young-gu's delivery to Diana.
A newer, more advanced android, also programmed to become the perfect boyfriend. Taking Diana as his girlfriend, he becomes the real Wang-joon's impersonator and tries to replace Young-gu as Da-da's absolute boyfriend.
The first script reading was held on June 22, 2018 and filming began in July.
Filming is complete and the series aired on SBS in May 2019. Originally scheduled to air for 40 episodes, the series was reduced by four episodes due to low ratings, as well as the suspension of the Monday-Tuesday drama timeslot that saw the following drama, Doctor Detective, move to the Wednesday-Thursday timeslot. The international broadcast remained at 40 episodes.
^Originally scheduled to air for 40 episodes, only 36 episodes are scheduled to air on SBS because of low ratings, as well as the suspension of the Monday-Tuesday drama time slot. The international broadcast remains at 40 episodes.
A TV representative said, "On May 23, the drama 'My Absolute Boyfriend' completed the transfer of broadcasting rights to 40 countries from 21 countries in Asia such as Hong Kong, Taiwan, Singapore, etc. to the Americas, Europe and the Middle East. Signing a contract with Japan - one of the main markets for Hallyu content - will soon succeed and it is expected that the number of broadcast countries will increase even more."