Sezaki Kota is hired as the new doctor for the Kaishin-maru, a traveling boat clinic. However, the next day he falls in love with a woman on a neighboring island and decides to quit his job and marry her.
Kota and crew visit Mioki Island, where Kota meets a beautiful school teacher, Kaoru. The two of them, along with Kaoru's student, Ryo, go on a field trip together, but Kota tries his hardest to turn it into a romantic date.
Dr. Kota is charmed by a popular TV host that comes to the Kaishin-maru to film a television segment. Learning that her father is suffering from a serious illness, Kota tries to help her parents harvest their family owned Mandarin orange orchard.
Mako's friends from her female gang days tag along on Dr. Kota and Mako's home visits. However, Mako makes it very clear to Kota that her friends are completely off limit.
Dr. Kota reunites with an old colleague on the island, but discovers that she will be leaving the clinic she poured her whole life into so she can move to Tokyo.