No way. The manga portrays their connection through mutual respect and competition in their journey to become great heroes. A kiss is not part of that narrative at all.
One great 'bakugo x reader fanfiction' is 'Bakugo's Unspoken Softness'. It shows a really interesting dynamic between Bakugo and the reader, with Bakugo slowly opening up in his own gruff way. The writer does an excellent job of capturing his character while also creating a believable relationship with the reader.
Well, in such a fanfiction, it often explores a different side of Deku being a villain and his relationship with Todoroki. It could be about how their dynamic changes from the original story. Maybe Deku as a villain has different motives and goals that somehow involve Todoroki, like trying to use Todoroki's power for his own evil plans or trying to turn Todoroki to his side.