Hinata is an introverted high school girl and Mikage is the "gal" who sits next to her in class. Hinata realizes Mikage is her friend from elementary school, and she wants to strike up the friendship again.
Nagisa is 17 years old and attends second grade in high school. He is apart from his parents and lives alone in the seaside town of Fujisawa in Kanagawa. He is passionate about surfing and works at a bathhouse in a hostel on the island Enoshima linked to Fujisawa. Shun is the same age as Nagisa and visits Fujisawa for spring break. They meet and develop a relationship more than friendship. However, the surfing equipment store owner's daughter, Chika, has been secretly in love with Nagisa.
Haruko is a single mother. She has an unusual living arrangement. She lives with her son Riku, her friend Aiko and Aiko's boyfriend Sorao. One day, Yuko stays at Haruko's house to attend an art institute for the summer. Yuko is the daughter of Haruko's old friend Tomoyo. They haven't spoken for many years prior to Tomoyo reaching out to Haruko to ask if her daughter could stay with her for the summer. Haruko and Tomoyo have an uncomfortable past.
