One possible plot could be that the transformation is the result of a failed jutsu. Team 7 then has to take care of baby Kakashi. Naruto might be really excited at first, seeing it as a chance to be the responsible one for once. Sakura would be the more practical caretaker, making sure Kakashi is fed and clean. Sasuke would be a bit aloof but secretly curious about this strange situation.
The story could also focus on how Kakashi's decision to adopt Naruto affects the village's perception of Naruto. People might start to see Naruto in a different light, not just as the Jinchuriki but as Kakashi's son. This could lead to Naruto having a more positive experience growing up in the village, with less ostracism. Kakashi would have to navigate the politics of the village while also raising Naruto, which could add a lot of interesting twists to the plot.
Naruto could also be a great caretaker in his own way. He has a big heart and lots of energy. He'd be constantly playing with baby Kakashi and making him laugh. Although he might not be as organized as Sakura, his enthusiasm would keep baby Kakashi happy and entertained.
Well, one possible plot could be that the other characters in the story are initially shocked. Papyrus might be super confused but also determined to take care of his 'baby' brother. They could go on little adventures where Papyrus has to protect Sans from various threats in the Underground while also trying to figure out how to turn him back to normal.
One possible plot could be that the magic in the world goes haywire. Natsu is caught in a spell that turns him into a baby. His friends in Fairy Tail are shocked at first. Lucy might take on the role of a caretaker, trying to figure out how to reverse the spell while also dealing with a baby Natsu's unpredictable behavior like randomly using small bursts of fire magic that are more like cute little puffs now.
Well, the plot could involve his teammates having to take care of him. They might struggle at first because Kuroko as a baby can't communicate in the same way. Maybe they have to figure out his needs like when he's hungry or sleepy. And they could also try to keep it a secret from the other teams to avoid any distractions during games.
The story could start with some sort of strange experiment gone wrong that turns Junkrat into a baby. The rest of the crew is shocked at first. Mei could use her scientific knowledge to try and find a way to reverse the process. Meanwhile, Reinhardt might tell stories to baby Junkrat about their adventures, as if he can understand. And Lucio could play some soft music to keep the baby calm.
Well, perhaps in the fanfiction, Sakura discovers she has a baby from some sort of mysterious experiment gone wrong. Kakashi, being the reliable and kind - hearted ninja he is, steps in to help her. He teaches her how to be a strong mother while also protecting the baby from those who might want to use it for their own evil purposes. They end up forming a little family unit of sorts.
Well, one possible plot could be that Jimmy's latest experiment goes wrong and he is turned into a baby. His friends, like Carl and Sheen, would be really confused at first. They might try to figure out how to reverse the process. Meanwhile, Jimmy as a baby would still have his super - intelligent mind, but be limited by his baby body. So he could be using baby - like actions to communicate his scientific ideas to his friends, like babbling and pointing at things he needs for a new experiment to reverse his condition.
In this fanfiction, it could be that a magical accident occurs during a potion - making class. Harry accidentally drinks a wrong potion which transforms him into a baby. Dumbledore then decides to keep Harry at Hogwarts, with the teachers taking turns to look after him. Meanwhile, Neville could be the one who discovers a clue about how to reverse the transformation by observing some strange behavior of magical plants in the school's greenhouse.
One possible plot could be that Sirius accidentally casts a spell that turns Harry into a baby. He then has to take care of Harry in this new form while trying to find a way to reverse the spell. He might face challenges like hiding Harry from the wrong people, and also dealing with Harry's baby - like needs such as feeding and changing diapers.