Zettai Kareshi (2008)

Though the two plots are fairly different, the Aibu Saki and Hayami Momokichi duo/couple take center stage in both dramas.

SIMILARITIES:
Both Japanese dramas explore how AI - human romantic relationships might occur
Both examine ethics of AI that appears identical to actual human
Both consider AI as new friend (not replacement or replica)
Both show AI as super human and functioning beyond programmed parameters

DIFFERENCES:
PAtKSH = female AI ZK = male AI
PAtKSH = 2020 Japanese 8 episodes ZK = 2008 Japanese 11 episodes

A robot and a human fall in... love?
These dramas challenge our idea of what makes a human a human, and what true love is.

Both stories function of the idea of a "Risou no Kareshi" or an ideal boyfriend, though both stories have different takes on the idea (one being a contract boyfriend, the other being a robot). It's really very Japanese in execution as well, with tried and true troupes and misunderstandings to tug at your heart strings.

the main lead is same robot
- Love triagle
female lead is different yet theme is similar, later robot will develop feeling to human

When her boyfriend was caught cheating on her, Terada Aki moved out of her apartment and into a sharehouse, where she found herself reunited with her first love, Hongyo Tomoya. Hongyo is novelist, but he has recently been having trouble with his writing, and he asked Terada for help - with a shocking proposal. To complicate matters, the other residents in the sharehouse also start interfering in Terada's life.

Robot maker, Kronos Heaven, finally develops "Night Tenjo", the perfect male humanoid programmed to be devoted and completely loyal to his lover. The company chooses temp worker Izawa Riiko to take part in a 5-day free trial. At first, Riiko only sees Night as a household appliance. But when she finds out how deep Night's devotion to herself is, Riiko finds herself falling in love with him. Joining the love triangle is Asamoto Soshi, a distinguished young executive at her company who has feelings for her.

Genres: Comedy, Romance, Sci-Fi
Tags: Robot, Adapted From A Manga, Cohabitation, Naive Female Lead, Android, Artificial Intelligence, Eccentric Male Lead, Nice Male Lead, Master-Servant Relationship, Master-Slave Relationship

Both are about a hard working woman that finds a boy in weird circumstances, takes him in and treats him as a pet, but due time becomes addicted to him and sees him as a man.

Both dramas have the lead roles creating a perfect Artificial Intelligence partner in a quest for love. However, the final ending may differ.

Both are romance dramas which presents love story between human and robot/cyborg.

Entrambi i drama, sia il live action giapponese che il live action coreano, sono tratti dal medesimo manga