"It's strange but... I have a bad feeling about this."

The sweet, adorable and cheerful Mary! Mary is a pretty popular person among the inhabitants of the Sea, mainly for her energetic behavior, and habit of always socializing with everyone... They live in a house in the depths of the Ocean, alongside their friends, Alco, Sakana and Kaiyo, their boyfriend. He is quick into action-- always jumping on most opportunities, making him look childish to many, while she's in reality already 21 years old... Bubbly and talkative, people living in the Sea cherish Mary very much. A loved one!