In the manhwa, it's not always straightforward. It could be due to a looming deadline or a special mission that requires overtime. But it also depends on the characters' circumstances and their determination.
You might start by looking at bestseller lists in the genre related to the manhwa. Or, check out novels by authors who have a similar writing style or approach to storytelling as the manhwa creator. Another idea is to browse reviews on book websites to find novels that match your preferences based on the manhwa.
One characteristic is the beautiful art style. Manhwa often has very detailed and aesthetically pleasing illustrations that enhance the romantic mood. For example, the way the characters' eyes are drawn can convey a lot of emotions. Another is the variety of themes. They can range from high school romances like in 'True Beauty' to more fantastical ones like in 'Orange Marmalade' where there are vampires.
Romance manhwa novels often have beautiful art styles. The characters are usually drawn in an aesthetically pleasing way, which enhances the romantic atmosphere. For example, the detailed expressions of the characters can show their love, shyness, or longing vividly.