Now that the unicorn trusts me, how can I ride him

Hint 1 of 5:

I guess you haven't found the riding gear, huh?

Hint 2 of 5:

And Lolotte has already told you to get the unicorn, right?

Hint 3 of 5:

I hope you already have the feather from Genesta's island.

Hint 4 of 5:

And I also hope you have the fish you can catch from the pier.

Hint 5 of 5:

If you do, save game and try swimming so a whale will catch you.