At its core, a romantic storyline is not about love; it is about obstacles . If two people meet, agree on everything, hold hands, grow old, and die peacefully, you have a eulogy, not a story. The writer’s job is to build a fortress of friction between the protagonists.
Fictional romance often relies on established "beats" or tropes to ensure reader satisfaction: The Meet-Cute
If you are looking for information or guidance on sexual health and wellness in Tamil, there are safer, educational resources available: Educational Literature : Books such as A Guide to Successful Sex Life (Tamil)