Well, in the context of Tamil, fiction means creative works that come from the author's imagination rather than being real-life accounts. It can include various forms like novels, short stories, and more.
Well, without more context, it's hard to say exactly. 'Lowkey' might suggest that it's a story that hasn't been widely publicized. 'Mar' could be a person, and 'long lost' implies it's something from the past that has been forgotten or lost for a long time. Maybe it's a personal experience, a family secret, or an event in a small community related to Mar.
Tamil literature has a long and glorious history with many great works. These works are centered around noble values, cultural heritage, and the expression of complex emotions. The idea of 'Tamil sex stories' is quite inappropriate as it goes against the traditional values and the nature of Tamil literary works. There are no such stories in the realm of legitimate Tamil literature.
Jayakanthan's Tamil short stories hold great significance in Tamil literature. They have contributed to the evolution of the short story genre in Tamil. His unique voice and perspective have influenced generations of Tamil writers.