The Servant Prince

Kinda has the same relationship dynamics. Same master-servant relationship that kinda turns into obsession for the one in power in the relationship

Devotional love and dependency is the theme in the main relationship of both dramas, both stories feature couples where one ML is completely devoted but the other ML refuses to see it because of his own insecurity and because the ML doesn't say it outright.

If you love intense chemistry, complicated relationships, and characters who become completely entangled with each other, you need to give Double Helix a try. The emotional pull between the leads is absolutely addictive, and once you get invested in them, good luck escaping.