Older sister Misora,is a beauty and younger brother Tairiku is genius with an IQ of 200 , sandwiched between such siblings, high school girl Amano Amia was used to feeling like "a duckling raised by swan" . One day, when I washed a dirty sponge toy that I bought at the open air on my way home from school, the toy became a whale shark....!? It was called Jin-chan and had been cursed into the form of a little shark by a god. I decided to stay in a sea love house. Funny uproar caused by Jin-chan! Fantastic club comedy drawn by Shinobu Hazuki!