I'd recommend 'Lookism'. It shares elements of drama and relationship-building like 'Love Jinx'. Also, the art style is quite appealing. Another one could be 'The Secret of Angel', which has a similar touch of fantasy and romance.
I'd recommend 'Lookism' and 'True Beauty'. They have comparable art styles and character development to Jinx. Plus, they focus on the lives and challenges of the main characters in an interesting way.
Well, 'The Gamer' could be similar. It has that element of adventure and unexpected plot twists like Jinx.
There are a few like 'Solo Leveling' and 'The God of High School'. They share elements of action and fantasy like Jinx.
You could try 'Killing Stalking'. It shares some similarities with Jinx in terms of the complex relationships and intense emotions portrayed.
You might like 'The Secret of the Friendly Neighbor'. It shares similar themes of forbidden love and complex character relationships as in Jinx. Also, the art style is quite appealing.
I'd recommend 'Cheese in the Trap'. It shares some common themes of love and challenges as Love Jinx. The character interactions and plot progression are comparable, making it a similar manhwa.
There are a few like 'My Love Story!!' which shares similar themes of romantic misunderstandings and complications.
You might find 'My Secret Brother' and 'The Remarried Empress' comparable. Both offer engaging plots and character developments similar to those in 'Love is an Illusion'.
I'd recommend 'Love in the Sultan's Court'. It has a comparable setting and plotlines. The focus on the complex relationships and the challenges faced by the characters is similar to 'Sultan's Love'.
I think 'My Secret Romance' is quite similar. It has a similar romantic theme and engaging storylines.