@JadeJokester well, If you want to know. Since it is a deku x toga, either toga will become a spy or deku. Or their relation ship will be forbidden. People like forbidden love.
Like, they like each other after deku gets kidnapped (Stockholm syndrome) but they don't tell each other about the heroes or villains plans, making it a huge drama, once people find out about their relationship, making both of them on either side a target. (DRAMA!!!)
Or you make one of the two completely switch sides, making deku a villain or toga a hero.
But I want you to think of the story. :]
These are suggestions you can build on and be inspired of. :D