When Kenji, Nanami, and Hikari were kids, they found an oyster with 2 pearls in it. It was decided that Hikari would keep the pearls since there were only two of them. Back in the present, Hikari has enrolled in Kenji's school, causing trouble for him. On top of that, she has begun diving more, but what is she looking for?
Cuando Kenji, Nanami, y Hikari eran niños, se encontraron con una ostra con 2 perlas en ella. Se decidió que sería Hikari mantener las perlas ya que sólo había dos de ellos. De vuelta al presente, Hikari se ha inscrito en la escuela de Kenji, causando una molestia para él. Además de eso, ella ha comenzado el buceo más, pero lo que está buscando?
