Another idea is that Adriene is sent on a quest by Eros to help restore love in a world that has lost its sense of passion. Along the way, he meets various characters, some who help him and others who try to stop him from achieving his goal.
One possible plotline could be Adriene's journey to discover his true powers as the son of Eros. He might face challenges that test his ability to use love - related powers in a positive way.
The main antagonists could be other gods who are jealous of Eros and see Adriene as a threat. For example, a god of war might oppose Adriene's mission of spreading love as it goes against their own values of chaos and destruction.
Another plotline could involve Percy having to protect the concept of Order from a powerful antagonist who wants to spread chaos. This could lead to epic battles and Percy having to use his unique connection to Order to defeat the enemy. He might also have to gather allies along the way who believe in the importance of Order.
One possible plotline could be Naruto discovering his true parentage as the son of Demeter. This could lead to a journey of self - discovery as he tries to understand his new powers related to nature. Maybe he has to hide this from his friends at first because he's not sure how they'll react.
One possible plotline could be that through some sort of magical or scientific accident, Naruto ends up in the One Piece universe and Zoro takes him under his wing, and over time Naruto is seen as Zoro's son - like figure. They could go on adventures together and Naruto would learn the ways of the pirates.
One possible plotline could be the OC's struggle to fit in. With Aphrodite as a mother representing love and beauty, and Death as a father, he might not be fully accepted in either the realm of the living or the dead. So he has to find his own place in the world.
A plotline could involve Naruto's identity being gradually revealed. There could be a lot of shock and disbelief among the villagers. Some might fear his power, thinking he has some hidden agenda as Mito's son. Meanwhile, Naruto would have to deal with his new - found identity and the expectations that come with it. He might also start to explore his connection to the Uzumaki clan more deeply and try to uncover secrets about his mother that were previously hidden. This could lead to all sorts of adventures and conflicts within the Naruto universe.
There are also 'eros fanfic' that take a more comical approach. Instead of a serious, intense love story, they might play on the idea of the characters' attraction in a humorous way. Maybe the characters are in a situation where their attempts at romance are constantly thwarted by comical misunderstandings or external factors, which can be really entertaining for readers who enjoy a lighter take on the 'eros' concept in fanfiction.
A plotline could involve Percy using his powers, which he may have inherited from Erebus, to fight against some great evil. Maybe there's a force threatening the world that only Percy, with his unique abilities, can stop. He could also be on a journey to discover more about his father and his own place in the world of the fanfiction.
I'm not sure specifically as there could be many different takes in such a fanfiction. It might be about a new and different origin for Harry Potter, making him the son of Eros, perhaps exploring how his character might be different with this new heritage, like having different magical abilities or a unique personality trait related to being the son of a god of love.
One possible plotline could be Harry struggling to come to terms with his true parentage. He might be shunned by the wizarding world for his connection to the dark and mysterious Slenderman. Another could be that he discovers he has unique powers from Slenderman, like the ability to teleport or manipulate the minds of others, which he has to learn to control while also dealing with the normal Hogwarts challenges.