Names like 'Aattukattil' and 'Mayyazhippuzhayude Theerangalil' might come up often, but honestly, they can feel a bit heavy for someone just looking for a pure romantic vibe. I'd lean more towards 'Oru Sankeerthanam Pole', which is this beautiful, almost musical novel about love and longing—it's got that timeless feel without being overly complicated. Then there's 'Verukal', which is a bit grittier, a story about a complex relationship that's more intense than sweet. For something that feels fresh and really captures modern longing, 'Adukala Illatha Veedu' is a quiet, almost melancholic look at love and loneliness that just sticks with you.
I'm probably forgetting some obvious ones, but those came to mind because they focus so tightly on the relationship itself, not just using it as a side plot.