Well, it depends on how much his dad knows about Cat Noir. If he doesn't know much, he might be a bit confused at first. He could ask Adrien what exactly a Cat Noir fanfic is all about. Maybe he'll be dismissive if he thinks it's just some silly fictional thing that distracts Adrien from more 'important' matters. But on the other hand, if he realizes it makes Adrien happy, he might be more accepting in the long run.
His dad could have a negative reaction. Given his controlling nature in some aspects of Adrien's life, he might see this fanfic interest as a waste of time. He may try to discourage Adrien from being involved with it, thinking it's not in line with the family image or the goals he has set for Adrien. However, if Adrien is able to show some positive aspects of the fanfic, like how it inspires creativity or how it has a good moral message, his dad might change his mind slightly.
There is a possibility that it could lead to a better understanding between them. Adrien showing his interest in the Cat Noir fanfic could be a way for his dad to see a different side of him. If his dad is open - minded enough, he might start to respect Adrien's individuality more and this could improve their relationship overall.
One idea could be that his dad initially reacts with shock and disbelief. He might start to question how he didn't notice all the signs before. Then he could try to use Adrien's identity as Chat Noir to further his own business or social standing in some way, creating a lot of internal conflict for Adrien.
Maybe the joke is 'Why is Hawkmoth always so stressed? Because he has too many akumas to manage!'.
Well, perhaps the fanfic is about a world where cats can talk and Adrien is sharing with his dad all the funny cat - related puns from this fictional world. For example, the cats might make puns about their favorite fish or the warm spots they like to nap in.
The funniest part could be when Adrien makes a really cheesy cat pun that catches his dad off - guard. For example, if he says 'Dad, this cat is so cool, it's the cat's meow!' and his dad just bursts out laughing at how corny it is.
Well, perhaps Adrien has been reading a lot of cat - themed books or stories that are full of puns. He decides to tell his dad these puns to brighten his day. For example, he says 'Dad, I heard that cats are great at multi - tasking. They can nap and look cute at the same time!'. His dad might then join in and they could have a fun time coming up with their own cat puns.
Since I don't know the specific content of this fanfic, it's hard to give a detailed summary. However, if we think about it, perhaps in the story Adrien uses cat puns to amuse his dad. It could start with Adrien seeing a cat and then coming up with a series of puns based on the cat's behavior or appearance. For example, if the cat has big eyes, he might say 'Dad, that cat has eyes like saucers, it's so meow - velous'.
On the other hand, it could bring them closer. His dad might start to see Adrien in a new light, as a brave and capable hero. This newfound respect could lead to a more open and trusting relationship between them.
Maybe Adrien says, 'Dad, why is Hawk Moth always so gloomy? Because he's in a bad'mood' (as in his evil plans).'
The main characters are clearly Adrien and his dad. Adrien is the one who has the cat puns to share, and his dad is the recipient of these puns.