Family pressure. The boy's family might oppose his relationship. If he was deeply in love and couldn't bear to be separated from his love, the constant family pressure and the inability to be with the one he loved could drive him to take his own life in a desperate attempt to escape the situation.
Maybe she had a serious illness that couldn't be cured. That's a common reason in such stories.
One reason could be family opposition. If the families of the boy and girl don't approve of their relationship, it can put a lot of strain on them and lead to a sad end. For example, if they have different religious or cultural backgrounds that the families can't accept.
One reason could be lack of female friends or relatives. If the bride doesn't have many suitable female options, she might turn to a close male friend or relative like a boy.
Another reason might be as a form of self - exploration. Boys may want to understand what it's like to be in the shoes (or rather, the high heels) of the opposite gender, explore different aspects of identity, or simply break free from the traditional gender norms.
One reason could be external factors like family disapproval. If the families of the girl and the boy have different expectations or cultural values, it can put a lot of strain on their relationship. For example, if one family is very traditional and wants an arranged marriage, while the couple wants to choose their own partners.
Mental health issues like depression or anxiety are often behind a boy's self - harm story. These conditions can make him feel worthless and hopeless. He may not know how to cope with the overwhelming negative emotions, so he resorts to self - harm. Also, a lack of a proper support system can contribute. If he doesn't have friends or family members he can talk to about his problems, he may feel isolated and use self - harm as a way to deal with that feeling.
Some fanfictions might explore the idea of Naruto being betrayed by someone close to him. This betrayal could lead to a situation where he is caught off - guard and killed. It adds a dark and dramatic twist to the story.
It could be that there are unforeseen circumstances in the Triwizard tasks. For example, the magical creatures or the challenges are far more dangerous than expected. The Triwizard maze might be filled with deadly traps that are not properly controlled, and Harry could be caught in one of them, leading to his death.
Maybe the girl didn't return his feelings. Or there could be external factors like family pressure or distance.
One possible reason could be revenge. Maybe the girl felt wronged by the boy or his family in some way and decided to kidnap him as payback.