Their is a world of different world filled with creatures. Yumi was the prince of the mermaids kingdom and while yumi childhood enemy was the prince of the Snake Kingdom

yumi was sitting against a cherry blossom tree watching the clear river water flower while the petals of the cherry blossoms fall in the river and then...yumi heard a noise and saw it was..his enemy

Yumi "It's nice to see you again...dummy" Yumi said in a annoyed firm tone..