I think in 'Sundays Day of Stories', the stories might include the simple joys of a Sunday. For example, a group of friends getting together on a Sunday afternoon to play games or just chat. It could also be about the local Sunday markets, with all the unique items and the interactions between the sellers and buyers.
There are quite a few. Some might focus on exploring different characters' backstories within the Twilight universe during a Sunday setting. For example, a fanfic could be about a character's discovery on a particular Sunday that changes their perspective in the Twilight world.
It's about a complex exploration of life, relationships, and personal growth. It might involve the experiences of the characters over the course of a month which could be metaphorical rather than literal, and how they face various challenges and changes in their lives.
The story might end tragically on Sundays. Maybe a major character dies or a dream is shattered. But it all depends on the author's imagination and the plot they've crafted.
The story of The Sundays concludes in a setting that brings closure to the main plotlines but also leaves room for interpretation. The ending ties up loose ends while still maintaining an element of mystery.
I'm not sure specifically as I haven't read it. But generally, a 'Clexa' fanfic often involves the relationship between Clarke and Lexa from a particular fandom. It might be about their adventures, relationship development, or emotional journey over the course of a year of Sundays, which could imply a long and perhaps somewhat episodic story.