Ji-a pursues her own dreams, while Min-gyu and Yoo-cheol become good partners in leading KM Financial.

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Yoo-cheol learns about the cause of Min-gyu's allergy and decides what to do about the board meeting.

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Baek-gyeon decides to change Aji 3's face. He deletes every video except for the emotion patterns.

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Min-gyu tries to stop Do-won and bring Aji 3 back, but Aji 3 is nowhere to be found, making Martin furious.

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When Martin Bold becomes impatient, Hwang Do-won promises that Aji 3 will be ready soon. Min-gyu tries to protect Aji 3.

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Ji-a and Min-gyu confess how they feel about each other. Meanwhile, Ri-el hears that Yoo-cheol will marry her.

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Ji-a keeps coming to see Min-gyu. Meanwhile, Min-gyu finds out Ji-a created the Heart Balls.

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Min-gyu discovers all about what Ji-a has done to him. From the shock, Min-gyu gets an allergic reaction.

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Min-gyu ends up returning to the beach to see Ji-a again. Meanwhile, he realizes Aji 3 kept a backup folder.

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Locked up in a storage room, Min-gyu tells Ji-a about his story. She feels sad but decides to leave him.

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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.

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Min-gyu sees Ji-a on the train and follows her. Min-gyu almost finds out the truth about Ji-a and Aji 3.

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Min-gyu calls Ji-a for a delivery service, but she rejects it. Meanwhile, Ji-a sees Min-gyu with Ri-el.

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Ji-a is sad about lying to Min-gyu. But Min-gyu has to reset her memory and misses her when she's gone.

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Min-gyu tells Baek-gyeon how he always waits for Aji 3 to come, but he says Min-gyu is too lonely.

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Baek-gyeon is shocked when Min-gyu says he likes Aji 3. Meanwhile, Dr. Oh tells Ji-a about his allergy.

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Baek-gyeon realizes why Ji-a broke up with him. Meanwhile, Yoo-cheol shows up at the start-up competition.

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Baek-gyeon says Aji 3 will be ready in three days. Min-gyu goes on a date with Ri-el and meets her dad.

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When Baek-gyeon sees Min-gyu ordering Aji 3 to do household chores, he volunteers to do them himself.

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Ji-a kisses Min-gyu first, which makes him feel confused and makes him keep a distance from her.

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Min-gyu learns how to kiss and tries to kiss Ye Ri-el on a date. Baek-gyeon follows them in secret.

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When it is time for Ji-a to leave, Min-gyu shows Baek-gyeon his allergic reaction to keep Ji-a by his side.

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Baek-gyeon punches Min-gyu, brings Ji-a home, and tells her she doesn't need to see Min-gyu anymore.

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Min-gyu becomes hopeful of curing his allergy. But Baek-gyeon is mad that Min-gyu and Ji-a are getting closer.

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Hong Baek-gyeon wonders if it's okay for Ji-a to stay with Min-gyu and realizes he still likes her.

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The cause of Min-gyu's allergy is told. Also, Ji-a saves Min-gyu's life when he gets an allergic reaction.

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Ji-a discovers Min-gyu is her brother's boss. Meanwhile, Hwang Yoo-cheol hears about Santa Maria and Aji 3.

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Min-gyu believes Ji-a is a robot and agrees to train her for a month, making Ji-a face many obstacles.

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Min-gyu decides to keep Ji-a. Meanwhile, Ji-a discovers Min-gyu is the head of KM Financial.

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Jo Ji-a goes to Min-gyu's house. She makes her first mistake, but she must keep pretending she's a robot.

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Min-gyu orders Aji 3 for trial. But that night, the research team accidentally spills beer on it.

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Kim Min-gyu gets an allergic reaction when in contact with humans, but he says he isn't lonely.

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