The relationship could start as a friendship. They might be comrades who train together often. As they train, they learn about each other's dreams and fears. One day, during a particularly difficult training session, Naruko gets injured and Itachi takes care of her. This event deepens their bond. Later, through some unforeseen circumstances, Naruko becomes pregnant. They then have to face this new situation together, with their relationship evolving from friendship to a more committed partnership as they support each other through the pregnancy.
One idea could be that Ron has been having a bad day and seeing Hermione at the Quidditch match makes him snap because he feels she should be studying instead. Maybe he's worried about upcoming exams and thinks Hermione is being too carefree. Another idea is that Ron is jealous. He sees Hermione chatting with one of the Quidditch players and gets mad because he secretly has feelings for her but doesn't know how to express it.
One interesting fanfiction could be where Harry's anger at being entered in the Triwizard Tournament against his will leads him to discover a hidden plot much earlier. He might start to suspect that someone within Hogwarts is working against him and begins his own investigation. This could involve him using his skills in a more unorthodox way, like using the Marauder's Map to track the movements of the teachers and other suspicious characters.
At first, their relationship might become strained. Zane's anger could make Syrus confused and a bit scared. Syrus might try to avoid Zane, not knowing how to deal with his anger.
There is a fanfiction where Harry's madness is caused by a strange magical influence rather than just the situation of the Goblet of Fire. This influence makes him see visions of a darker future for Hogwarts if the tournament goes wrong. So, he tries to stop the tournament altogether, which puts him at odds with the Ministry of Magic, Dumbledore, and most of the school. But as he digs deeper, he uncovers a conspiracy that dates back decades.
Perhaps in the fanfiction, Itachi and Naruko are on a dangerous mission together. They get trapped in a strange place for a long time. During this time, they rely on each other for survival and their bond deepens. Eventually, Naruko becomes pregnant. But Itachi is worried about his past and the potential danger his enemies could pose to Naruko and their unborn child. So, he tries to find a way to protect them while also coming to terms with his new role as a future father.