You can start by looking on fanfic platforms like Archive of Our Own (AO3). It has a large collection of fanfics, and you can easily search for Bakugou x Kirishima stories. Just type in their names in the search bar and filter for the ones that seem cute based on the summaries.
One cute fanfic could be about Bakugou and Kirishima going on a training adventure together. They face challenges and Bakugou's rough exterior softens as Kirishima's positive attitude rubs off on him. It shows their friendship growing in a really sweet way.
In the story of the dog and the cat who fell in love. When the cat was cold, the dog would curl up around it to keep it warm. It was a really cute moment showing their love.
One cute moment could be when Saeran blushed as MC complimented his new haircut. Another time might be when MC tripped a little and Saeran caught her in his arms, their eyes locking for a moment in surprise and then laughter.
One possible analysis could be that their relationship in fanfic often showcases a strong bond of friendship. Bakugo's explosive personality and Kirishima's more stable and friendly nature create an interesting dynamic. Fanfic writers may explore how they support each other during battles or in their daily lives at school. For example, Kirishima might be the one to calm Bakugo down when he gets too riled up, and Bakugo could inspire Kirishima to be more confident in his abilities.
Kirishima is still alive in the manga. The story doesn't have that plot point. Usually, character deaths are significant events and are clearly shown if they occur.
One cute moment could be when Naruto finally realizes Hinata's true feelings for him. In some fanfictions, it's shown through a gentle touch, like Hinata reaching out to hold Naruto's hand during a quiet moment, and Naruto blushing but not pulling away. This simple act shows their growing closeness.
A very memorable moment might be when they overcame their first big argument. They had different opinions on something important, but instead of letting it drive them apart, they sat down, talked it out, and in the end, their relationship became even stronger. And of course, their first date, where they were both a bit nervous but also excited. They went to a fair, rode the Ferris wheel, and as they were at the top, looking out at the twinkling lights below, they knew this was the start of something really special.