The Air

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

They have a very similar setup. Both stories involve a scheme to seize the throne, an attempted assassination, and a doppelgänger who takes the place of the crown prince or princess. The main difference is that The Air is a GL story, while Thara Himalai is a straight romance. In The Air, the love interest is the princess's bodyguard, whereas in Thara Himalai, the female lead is a doctor.

Both are Y series of Thailand. In both the series the tops have to protect the prince/princess of the royal families.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

Both have the same author Salmon, part of the same megaseries 4 elements, and characters from the four series will interact on screen.

The Air is very similar to Never Let Me Go because both dramas focus on a dangerous romance between a powerful person and their protector.
In The Air, Princess Blue is targeted by assassins and Police Lieutenant Lom is assigned to protect her. In Never Let Me Go, Nuengdiao is threatened by his family’s enemies and Palm becomes his bodyguard.
In both dramas, love grows between two people from different worlds who must trust each other to survive.