The ring finger is often associated with marriage and commitment in many cultures. Traditionally, wedding rings are worn on this finger to symbolize a marital bond.
It's a yaoi light novel. It mainly focuses on the relationship between male characters, often exploring themes of love and self - discovery in a romantic context among boys.
Since I don't know the exact 'Little Finger Story', if it's a story about the little finger being small but still important, the moral could be that size doesn't matter. Every part, no matter how small, has its value and role to play.
There might be a family - oriented 'Little Finger Story' where the little finger represents the youngest or the smallest in a family. For example, in a family of fingers (thumb, index, middle, ring and little finger), the little finger might have a story of always being protected by the other fingers, yet having its own unique role, like being able to reach into small spaces that the others can't.
The moral could be that size doesn't matter. Just like the little finger, even though it's the smallest, it has its own unique abilities and importance.
The story of FFXIV Little Ladies Day 2018 could have been a heartwarming one. It might have started with the anticipation building up in the game's cities and villages. There could have been NPCs with their own tales related to Little Ladies Day. For example, an old lady might have told the players about how she used to celebrate it when she was young. Quests could have led players to discover the history and significance of the day within the game's universe, while also allowing them to partake in fun activities like decorating for the occasion or giving gifts to the little ladies in the game.
I'm not sure specifically what the 'little finger book story' is about as it could be a very unique or personal story. It might be a story related to a little finger in some symbolic or literal way, perhaps about an adventure of a character's little finger or a story told using the little finger as a motif.