Bakugou might be initially shocked. He's used to Izuku calling him 'kacchan' for so long that it's become a normal part of their relationship. So, when Izuku stops, it could throw him off balance.
One possible reason could be that Izuku has grown up and wants to have a more formal relationship with Bakugou. As they progress in their hero training and development, Izuku might feel that the childhood nickname 'kacchan' no longer suits their new, more mature dynamic.
When boys call you Da Bao, they usually express their closeness and fondness for you. This form of address could be a special hobby or an expression of longing and feelings for you. However, the specific meaning still needed to be judged based on the boy's expression and relationship. If his expression was frivolous, he might just be joking. If the relationship between the two people is not close enough, this kind of address may cross the line. You can stop him from calling you like this. In short, boys calling you Da Bao was usually an intimate way of addressing you, but the exact meaning needed to be judged according to the situation.
One great 'kacchan x reader fanfiction' is 'A New Beginning' which shows a really interesting dynamic between the two characters. It has a well - written plot that slowly builds their relationship in a believable way.
In such a fanfiction, the jealousy aspect can also add a lot of drama. For example, if Deku is oblivious to Kacchan's jealousy, it can create misunderstandings. Kacchan might misinterpret Deku's friendly gestures towards others as something more, and this can cause tension. It's a great way for fanfic writers to delve into the psychological aspects of these two beloved characters and create engaging stories.
Well, 'Deku and Fem Kacchan: A Different Dynamic' is a great fanfiction. In this one, the author delves deep into the characters' personalities. Fem Kacchan is shown as having a more complex relationship with Deku. It's not just about rivalry but also about mutual respect. Then there's 'Fem Kacchan's Redemption with Deku' which is about Fem Kacchan trying to make up for her past behavior towards Deku and how they grow closer as a result. And 'Deku's Support for Fem Kacchan' shows Deku being there for Fem Kacchan during her tough times, which is really heartwarming.
One common theme is friendship development. They might start off as just classmates but then grow to be really good friends. Another could be about them working together in a mission and learning to trust each other.
One idea could be '5 Times Bakugou Saved the Day'. It would show his heroic side as he uses his powerful quirk to rescue people in different dangerous situations. Another idea is '5 Moments Bakugou Realized His Mistakes', which would focus on his character growth.