♂ m

Shinichi has lost his mother at a young age and lived with his aunt and uncle on an island until he was 10 years old. Now he returns to the island due to being transferred there. The fact that he has been in love with his aunt for a very long time complicates his life.

♀ f 38

Protagonist's Aunt, whom he views as a mother figure since his own mother died at a young age. Mariko, along with her husband, took care of the protagonist until he was 10. She works as a diver.

♀ f 18

The daughter of Mariko and Yasuaki. She attends a school away from her home island. Likes Shin'ichi.

♂ m

Husband of Mariko. He gets along well with his wife. He likes drinking and always asks Shin'ichi to drink with him. He wants Shin'ichi to get married with his daughter Yako.