The showdown between Erika and Hiro has finally begun! How will their conflict end? And to make things worse, Nagi suspects his parents are getting divorced! Beneath the tranquil surface of Umino-tei lies his parents' unknown past, and it's about to come into the light. And when Nagi and Erika are invited to Yakushima for the grand opening of the newest Amanoya hotel, what destiny could be awaiting them on the mysterious island?!