Hatomi Island revisited, it now has 6 foster children. This is Ruri's 3rd New Year's day on the island. Ruri, a second-year high school student who has been living and growing up on the island, heard from Ruri's class teacher that Miyahara suddenly moved to the island with her son Shion, who is the same age as Ruri. This is an exciting story about Ruri’s first love and the residents involved in change. There are blue seas, beautiful coral reefs, and Ruri’s growth story.