Perhaps in the fanfiction, he is punished for failing to protect a certain important object or person. This could lead to him having to endure strict training or other forms of discipline to make up for his mistake.
Another possibility could be that he is punished for being too reckless in a battle. He might put his teammates in danger, and as a result, face some form of punishment from his comrades or superiors.
It could be his father, Vegeta. Vegeta is known for his strict training methods and high expectations. If Trunks fails to meet those, Vegeta might punish him to make him stronger.
One possible scenario could be that Voldemort punishes Harry Potter by using the Cruciatus Curse on him. In the wizarding world, this is a very cruel form of torture. Another situation might be that Voldemort imprisons Harry in a dark and desolate place, like the dungeons of Malfoy Manor. He could also force Harry to watch as he harms his friends, which would be a psychological form of punishment for Harry, who values his friends highly.
One interesting dbz trunks fanfiction could be about Trunks' time - traveling adventures in more detail. Maybe it focuses on his experiences in the past and how they shape his character in the present. For example, his interactions with the Z - fighters in the past timeline and how that knowledge helps him in his own time.
One possible scenario could be that Hermione breaks a very important school rule in a creative way. For example, she might use a forbidden spell to save a friend in a dangerous situation but knows she has to face the consequences. Another could be that she feels guilty for not helping a classmate enough in a group project and wants to be punished as a form of self - flagellation. Or perhaps she accidentally damages a valuable magical artifact and willingly submits to punishment as a matter of principle.
There are a number of 'dbz trunks lemon fanfiction' that delve into the more emotional and personal side of Trunks. These can include his inner thoughts and feelings about his family, his duties, and his place in the Dragon Ball Z universe. Some fanfictions might combine this with a romantic plot involving him. For instance, a story could show how he struggles to balance his love life with his responsibilities to protect the Earth, all while dealing with his own personal demons. This type of fanfiction can offer a deeper look into the character that we might not get in the original series.
A lot of fanfictions focus on her relationships. It could be her relationship with her family members in a different way than in the original series, or her forming new friendships or even romantic relationships with other characters. Also, the theme of her dealing with the aftermath of battles and protecting the Earth is quite common.
One idea could be Trunks traveling to an alternate universe where the rules of DBZ are slightly different. For example, the Saiyans never lost their planet but have a different culture. Another could be Trunks teaming up with a character from a different anime in the Dragon Ball Z world to fight a new, powerful enemy. Maybe a character from Naruto who has unique jutsu skills that could combine with Trunks' power in an interesting way.
One popular 'female trunks dbz fanfiction' story could be about her adventures in an alternate universe where she has to team up with unlikely allies to save the Dragon Ball world. In this type of fanfiction, the author might explore her character in a new light, perhaps giving her different powers or relationships.
One common scenario could be a boy not doing his homework and a strict female teacher punishing him by making him stay after class to complete it. Another might be a boy disobeying his strict mother at home, like not cleaning his room, and she punishes him by taking away his video game privileges.
One possible scenario could be that it happens after a big battle. Vegeta, having realized his deep feelings for Bulma during the fight, when the danger has passed, he just can't hold back anymore and kisses her passionately. It could be a moment of pure emotion, with the adrenaline from the battle still coursing through them.