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.
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.
They could also start training together more often. Since Adrien is aware of Marinette's identity, they can practice their superhero skills without the worry of revealing themselves. This would make them a more formidable team. They could learn from each other's strengths and weaknesses, and Ladybug and Chat Noir would be able to defeat akumas more quickly and efficiently.
One great male Ladybug x Chat Noir fanfiction is 'The Unlikely Bond'. It explores a different dynamic between them, with a male Ladybug who has a more assertive personality. It delves into their friendship and how they face villains together in a unique way. Another good one is 'A New Perspective' which shows how their relationship could change if Ladybug was male. It has some really interesting plot twists.
Chat Noir is often extremely helpful in fanfics. He uses his superpowers like cataclysm to protect the city and the people he cares about. For example, in many fanfics, he might save a civilian from a falling building by using his agility and acrobatic skills. His helpful nature also extends to his relationships, as he is always there to support Ladybug, whether it's in battles or in dealing with personal issues.
In 'chat noir x male reader fanfiction', a frequent theme is self - discovery. The male reader may discover new aspects of himself while interacting with Chat Noir. Also, the theme of loyalty is quite common. As their relationship grows, they become loyal to each other, like in stories where the male reader helps Chat Noir in a tough situation. Additionally, the theme of growth is present. Both characters may grow and change as a result of their relationship, for example, the male reader becoming more confident or Chat Noir becoming more open.
There are several great 'chat noir x male reader fanfiction' out there. For example, 'Chat Noir's Unlikely Ally' where the male reader, who is initially not a part of the superhero world, becomes an important part of Chat Noir's life. It shows how their relationship evolves from strangers to close friends. 'A Day in the Life of Chat Noir and the Male Reader' gives a detailed account of their daily interactions, full of humor and some light - hearted moments. 'Chat Noir's Trust' is about how Chat Noir learns to trust the male reader, which is a key aspect of their relationship development.
One great Miraculous Ladybug Chat Noir x OC fanfiction is 'The New Hero in Paris'. It has an interesting OC who has unique powers and a great dynamic with Chat Noir. The story is full of action and mystery.
One possibility is that his father could be an older, more experienced superhero. Maybe he was a hero in the past and has been in hiding or something, and now he comes back to reunite with Chat Noir.