Love. Just like any other character, Draco can be heartbroken in fanfiction. If he loses someone he loves, whether it's a friend or a romantic partner, he could cry. It shows his vulnerability and that he's not just the tough - guy Slytherin he often tries to be.
Fear is also a possible reason. If he's put in a life - threatening situation or a situation where he has no control, he might break down and cry. For example, if he's captured by Death Eaters who are not on his side or if he's in danger of being exposed for something he's done wrong.
One possible reason could be the pressure he faces from his family. The Malfoy family has high expectations and a dark reputation. Draco might feel suffocated by the need to uphold the family name and follow their dark path, which could lead to him breaking down and crying in the bathroom where he can be alone.
Another reason might be that he feels a great sense of guilt. For example, if he made a big mistake that had serious consequences for others, he would be overcome with guilt, which could manifest as crying.
Isolation. Snape is a lonely character. He doesn't have many friends, and he is constantly in a difficult position between the Death Eaters and the Order of the Phoenix. His feeling of being alone and not being fully understood by anyone can lead to crying in fanfiction.
She might be crying out of frustration. For example, if she's been trying really hard to achieve a certain goal in the fanfiction, like mastering a new jutsu in a Naruto - themed fanfiction, but keeps failing. The stress and disappointment could lead to tears.
One possible reason could be that he is lonely. In many fanfictions, Naruto is often ostracized as a baby due to the Nine - Tails inside him. He might be crying because he feels the lack of a warm, loving presence around him.
One possible reason could be that she loses a Pokemon battle that she really thought she could win. In the Pokemon world, battles are very important to trainers, and losing one that she had high hopes for might make her cry.
Sakura might cry over Sasuke because of the distance between them. In many fanfictions, Sasuke goes off on his own journey, leaving Sakura behind. She misses him and the pain of separation makes her cry. Additionally, if Sasuke gets injured severely in a fight, Sakura, being a medic, might cry out of worry for his well - being and the possibility of losing him.
Perhaps he's had a falling - out with his friends. In the Slytherin house, there could be a lot of power dynamics and rivalries. If he's been betrayed by someone he thought was a friend, it would be very upsetting.
In fanfiction, their kiss might be a way to break free from the expectations placed on them. Harry is always seen as the hero and Draco as the villain's sidekick. By kissing, they are defying those roles and expectations. It could also be a way to gain power over each other in a different sense. Instead of the usual power struggle based on magic or family name, the kiss becomes a new form of power dynamic between them.
One possible reason could be peer pressure. Maybe the other Slytherins in the fanfiction are pressuring him to cheat in order to maintain the house's reputation for being cunning and getting ahead at all costs. Another reason might be his own insecurities. He could feel that he's not smart enough or good enough compared to his classmates, so he resorts to cheating as a way to seem more competent.