Kamen Rider Durandal and Sabela x Miraculous [Raibaru-kan no ai]

Chapter 1: Meet the Swordsman of Time and Sea

'This story begins 15 Earth Realm years ago before Durandal and Sabela, where it tells the tale of a world where the Serizawa family rules; The Ocean Realm.'

The planet was shown to be completely covered by water.

'A world where everything is underwater. The cities, the villages, the gardens, even the people were under because they can breathe underwater.'

A young boy swims quickly in the ocean. 

'Suhara Serizawa loves the Ocean Realm. He loves the animals, the coral reefs that shelter life, and even the schools.'

The young boy swims up to a really gigantic submarine with other children swam up to it.

The submarine was revealed to be a school that travels all over the oceans of different worlds.

'Suhara only goes to school for one reason. To make friends and to have his independence.' 

All the kids walk down the stairs to their class, while a few kids give Suhara his space. 

'It's not like he didn't like going to school, it's just he doesn't need to go. He's a very unique kid.'

The class has a lecture and Suhara answers all questions given to him. Every question there was he got them all correct.

(Scene Change)

'But there is one thing in school that he couldn't stand. And that something was therapy sessions after school.'

In Dr. Lakecus Office, he was assigned with Suhara in his current session.

Lakecus: Alright, Your Majesty, shall we get started? 

Suhara: Why, of course, doctor.

The young prince then analyzes the chair the doctor sits on.

Lakecus: Ah, you recognize my chair, then?

Suhara: Why yes. It looks like one of the chairs I use at the castle in Amphibia City.

Lakecus: That's because it was once used in your castle. My great grandfather acquired it a century ago. But now... let's get to our session.

Suhara: Why of course.