Kim Min Gyu has wealth and success, but lives an isolated life due to his allergy of people. He then meets and falls in love with a girl who is pretending to be a robot for her ex-boyfriend, a genius robots professor.
Episodes
I’m Fine Being Alone
Kim Min Gyu gets an allergic reaction when in contact with humans, but he says he isn't lonely.
Aji 3
Min Gyu orders Aji 3 for trial. But that night, the research team accidentally spills beer on it.
I Can Do Many Things for You
Ji A goes to Min Gyu's house. She makes her first mistake, but she must keep pretending she's a robot.
Welcome to My Home
Min Gyu decides to keep Ji A. Meanwhile, Ji A discovers Min Gyu is the head of KM Financial.
I am Glad You are a Robot
Min Gyu believes Ji A is a robot and agrees to train her for a month, making Ji A face many obstacles.
You Brought Back the Sunlight
Ji A discovers Min Gyu is her brother's boss. Meanwhile, Yoo Cheol hears about Santa Maria and Aji 3.
Painful Memories
The cause of Min Gyu's allergy is told. Also, Ji A saves Min Gyu's life when he gets an allergic reaction.
Beautiful Memories
Baek Gyeon wonders if it's okay for Ji A to stay with Min Gyu and realizes he still likes her.
I’m Cured
Min Gyu becomes hopeful of curing his allergy. But Baek Gyeon is mad that Min Gyu and Ji A are getting closer.
I’ll Protect You My Own Way
Baek Gyeon punches Min Gyu, brings Ji A home, and tells her she doesn't need to see Min Gyu anymore.
I Want to Kiss
When it is time for Ji A to leave, Min Gyu shows Baek Gyeon his allergic reaction to keep Ji A by his side.
This Is When You Must Kiss
Min Gyu learns how to kiss and tries to kiss Ri El on a date. Baek Gyeon follows them in secret.
A First Kiss Tastes of Apples
Ji A kisses Min Gyu first, which makes him feel confused and makes him keep a distance from her.
You are Concerned for Jo Ji A
When Baek Gyeon sees Min Gyu ordering Aji 3 to do household chores, he volunteers to do them himself.
I am Not a Robot
Baek Gyeon says Aji 3 will be ready in three days. Min Gyu goes on a date with Ri El and meets her dad.
One Person is Enough
Baek Gyeon realizes why Ji A broke up with him. Meanwhile, Yoo Cheol shows up at the start-up competition.
You Can Send Aji 3 Away Now
Baek Gyeon is shocked when Min Gyu says he likes Aji 3. Meanwhile, Dr. Oh tells Ji A about his allergy.
Seeing You is Too Hard for Me
Min Gyu tells Baek Gyeon how he always waits for Aji 3 to come, but he says Min Gyu is too lonely.
I’ll Recognize You
Ji A is sad about lying to Min Gyu. But Min Gyu has to reset her memory and misses her when she's gone.
What Do I Need to Do?
Min Gyu calls Ji A for a delivery service, but she rejects it. Meanwhile, Ji A sees Min Gyu with Ri El.
Encounter on the Train
Min Gyu sees Ji A on the train and follows her. Min Gyu almost finds out the truth about Ji A and Aji 3.
Geoje Island
Min Gyu tries to stop Ji A from going away, but Ji A tells him that she isn't Aji 3 but only a model for it.
The Truth
Locked up in a storage room, Min Gyu tells Ji A about his story. She feels sad but decides to leave him.
You Promised
Min Gyu ends up returning to the beach to see Ji A again. Meanwhile, he realizes Aji 3 kept a backup folder.
Have You Been Lying All Along?
Min Gyu discovers all about what Ji A has done to him. From the shock, Min Gyu gets an allergic reaction.
Ji A Knows Him Best
Ji A keeps coming to see Min Gyu. Meanwhile, Min Gyu finds out Ji A created the Heart Balls.
I Really Need You
Ji A and Min Gyu confess how they feel about each other. Meanwhile, Ri El hears that Yoo Cheol will marry her.
Just a Product Owned by a Man
When Martin becomes impatient, Do Won promises that Aji 3 will be ready soon. Min Gyu tries to protect Aji 3.
Aji 3 Disappeared?
Min Gyu tries to stop Do Won and bring Aji 3 back, but Aji 3 is nowhere to be found, making Martin furious.
Goodbye, Aji 3
Baek Gyeon decides to change Aji 3's face. He deletes every video except for the emotion patterns.
A New Beginning
Yoo Cheol learns about the cause of Min Gyu's allergy and decides what to do about the board meeting.
Final Episode
Ji A pursues her own dreams, while Min Gyu and Yoo Cheol become good partners in leading KM Financial.
Top Cast
Yoo Seung-ho
Kim Min-gyu
Chae Soo-bin
Jo Ji-a / Aji 3
Uhm Ki-joon
Hong Baek-gyeon
Park Se-wan
Pi
Song Jae-ryong
Hoktal
Ko Gun-han
Ssanip
Seo Dong-won
Jo Jin-bae
Lee Min-ji
Hwang Seon-hye
Kang Ki-young
Hwang Yoo-cheol
Hwang Seung-eon
Ye Ri-el
