A plot could revolve around Izuku feeling a bit down about being quirkless and Tsuyu being there to cheer him up. She takes him to her favorite places in the city, like a small pond where she likes to relax. As they spend time together, they start sharing their dreams and fears. Tsuyu tells Izuku how much she admires his determination without a quirk, and this gives Izuku the confidence boost he needs. Their relationship blossoms from there.
A more complex plot could involve a time - traveling aspect. Villain Izuku from the future travels back in time and meets a younger Tsuyu. He tries to manipulate events to his advantage, but Tsuyu's kind nature starts to change him. This could lead to a whole new timeline where Izuku's path to villainy is altered.
Perhaps Deku discovers a dark secret about the origin of quirks and decides that the world would be better off without them. So, he starts a villainous campaign to eradicate quirks. He could form an alliance with other outcasts who have been mistreated due to their lack of quirks or abnormal quirks.
Their relationship could develop uniquely if Izuku starts teaching Tsuyu about things he's learned from his non - quirk - based studies, like advanced first - aid or survival skills. Tsuyu, in turn, can introduce Izuku to her amphibious friends and the unique world she comes from. This exchange of different knowledge and experiences can bring them closer in a very special way.
One interesting aspect could be their unique relationship dynamics in fanfiction. For example, a story might explore how Izuku's determination and Tsuyu's calm nature interact in different situations, like during a difficult mission. Maybe they have to rely on each other's strengths and in the process, their bond deepens.
In this type of fanfiction, the plot might start with Izuku being bullied as usual because of his quirkless state. Toga witnesses this and for some reason, feels a connection. Maybe she was bullied in the past too, for her abnormal quirk. Toga then decides to protect Izuku from the bullies. Izuku is shocked but also grateful. As time passes, they start to communicate more. Izuku shares his dreams of being a hero even without a quirk, and Toga starts to question her own villainous ways. Their relationship develops as they influence each other's views on life and society.
One plot idea could be Izuku struggling to control his new Gravity Quirk at first. He might accidentally make things float or slam to the ground. For example, in his daily life at school, his books start floating during class, causing chaos. Another idea is that he uses his Gravity Quirk to create new combat moves. He could manipulate the gravity around his opponents to make them immobile or off - balance.
One plot idea could be that Dadzawa discovers Izuku has some hidden talents that no one else has noticed. For example, Izuku might be able to sense danger in a unique way. Dadzawa then takes it upon himself to train Izuku privately to hone this skill. Another could be that Izuku gets into some trouble at school, and Dadzawa, as a father - figure, has to step in and help him deal with the consequences while also teaching him a valuable lesson about responsibility. A third idea is that they go on a mission together where Izuku's quick thinking and Dadzawa's experience combine to save the day.
One idea could be Izuku struggling to control his dragon quirk at first. For example, he might accidentally breathe fire during a normal school day, causing chaos. Another plot could involve him discovering unique abilities of his dragon quirk, like flying at high speeds or having super - strong scales for defense. Maybe he has to face a villain who has a quirk that is specifically designed to counter dragon - like powers, which would make for an intense battle.
One idea could be that Izuku is kidnapped by a group who wants to use his knowledge of hero strategies against the heroes. They hold him hostage in an abandoned building. Another could be that a villain with a grudge against All Might kidnaps Izuku as a way to lure All Might into a trap. Maybe a group of anti - quirk fanatics take Izuku because they believe his powerful quirk is a threat to their cause.
One great Izuku quirkless fanfiction is 'A Different Path'. It shows Izuku finding his own way to be a hero without a quirk through sheer determination and intelligence. He uses his knowledge of hero strategies and martial arts to hold his own against quirk - users.