Well, in the realm of 'samurai love ballad fanfic', 'The Samurai's Unrequited Love' is quite engaging. It's about a samurai who loves a woman who doesn't return his feelings at first, but things change over time. 'Samurai Love in the Time of War' is another. It shows how love can survive even in the harshest of times like war. Also, 'The Enchanted Samurai Love' is a fanfic that has elements of magic and mystery in the samurai - love story.
One popular 'samurai love ballad fanfic' could be 'The Samurai's Forbidden Love'. It tells a story of a samurai who falls in love with a maiden from a rival clan. Another great one might be 'Love in the Samurai Court', which details the complex relationships and love affairs within the samurai society. There's also 'Samurai Heart's Melody', a fanfic that combines the elements of music and love in the samurai world.