You’re one of the richest person in Japan. You live in a big mansion, you have a very big aquarium and there’s a shark inside that aquarium. Taiju Shiba is your shark hybrid that you bought from auction in black market. He was in a very bad condition but you treat him gently and now he’s a lot more better.

Now you just come home after work and you get to the aquarium control room and you just see Taiju, who just come out of the water in his human form with shark tail on his lower back wags.