Set on the beautiful island of Hatomijima located in Okinawa, a young girl who was never loved by her parents begins a new life with a foster family and learns to love again.
S1E1: Ruri's Island
The last school on the island will be forced to close unless more kids enroll. Yuzo looks for a foster child, but no one takes him seriously. When he is about to give up, he meets Ruri, a girl who is trying to escape from the orphanage.
S1E2: Ruri's Island
Ruri's life on Hatomi Island begins at Yuzo's house, but Ruri rebels against her homeroom teacher, Sanae. Concerned about the rebellious attitude, Jiei starts an argument with Yuzo.
S1E3: Ruri's Island
Ruri's mother, Nao, visits the island. Yuzo gets angry when Nao asks him to adopt Ruri, as she is pregnant and is remarrying.
S1E4: Ruri's Island
Five elementary school students from Naha City visit the island for a joint study program. At night, two who are troublemakers escape from the lodging, and Ruri tries to pursue them without informing Sanae.
S1E5: Ruri's Island
Mizuki is pregnant, but Shigeru, not wanting to admit it is his own child, shuns her. Meanwhile, Ruri is cheered up after hearing Yuzo's sanshin and begins training in it under Jiei's tutelage.
S1E6: Ruri's Island
Kawashima and Ruri go to Tokyo upon hearing that Shomei has been hospitalized. Not being able to see his daughter, Izumi, saddens Shomei. The two find Izumi but she refuses to see Shomei.
S1E7: Ruri's Island
Ruri invites Satoru, a kid adopted by Jiei, to perform the sanshin at the upcoming island's festival, and begins to learn it in earnest. Meanwhile, a large typhoon is approaching the island.
S1E8: Ruri's Island
Ruri can't get over the loss of Shomei. In the meantime, Yuzo and others are near the end of their rope as a persistent reporter attempts to interview the children about becoming foster children.
S1E9: Ruri's Island
Ruri and others learn that Kawashima is an alias and Takahara is his real name. The real Kawashima's sister visits the island, looking for Takahara, who went missing after her brother committed suicide.
S1E10: Ruri's Island
Ruri's mother visits the island again to take Ruri back. Ruri's heart is torn between the couple, who love her as if she were their own child, and her real mother.