I'm not sure specifically as the title doesn't give clear indication of the characters. It could be original characters created by the fanfic author. Maybe it's a story about a young couple who are the main focus of the 'trouble with love' part.
In a fanfic, the crazy trouble with love could be unrequited love. One character might be deeply in love with another who doesn't feel the same way, leading to all sorts of heartache and drama. For example, they might constantly try to win the other's affection, but only face rejection and disappointment.
Most likely Ben would be one of the main characters. Since it's a Ben 10 fanfiction, he's usually at the center of things. And if it's about love, perhaps his love interest, whoever that may be in this story, would also be a main character. Maybe Gwen could also play an important role, either as a friend giving advice or getting involved in some way in the love - related drama.
Gray could also be a part of it. He might be the one teasing Natsu about his love problems or even getting involved in some sort of love triangle situation with Natsu. And Erza, she could be the voice of reason, trying to get Natsu to sort out his feelings in a more proper way, while also dealing with her own reactions to Natsu's love - crazed antics.
In this kind of fanfic, a likely theme is the struggle between heart and mind. The characters may have strong emotions for someone but their rational side tells them it might not be a good idea. Additionally, the theme of growth through love can be present. Through the experiences in their love - related troubles, the characters may grow and develop as individuals.
I'm not sure specifically as I haven't read it. But generally, it might be about Shirou's crazy experiences related to love in a fan - created story.
Communication is key. If the characters sit down and talk honestly about their feelings, misunderstandings can be cleared up. For instance, if it was a case of misinterpreting a friendly gesture as romantic, a simple conversation can set things right.
Another possibility is that Hinata could be the main love interest. Naruto and Hinata had a relationship that developed over time in the original Naruto story. In this fanfiction, their love could be filled with more crazy and troublesome situations, like family objections or some new enemy targeting their relationship.
It depends on the specific fanfic. It could be two well - known Pokemon like Pikachu and Charmander as the main characters causing double trouble.
You could try looking on fanfic - specific websites like Archive of Our Own or FanFiction.net. They usually have a wide range of fanfics.
I'm not sure specifically as the name doesn't give away the characters directly. But typically in a love novel, there would be the two lovers at the center. Maybe a male and a female character who are from different backgrounds or have different personalities.