Synopsis

Aoi Natsumi (Mori Nana) is no stranger to a busy summer, being born and raised in a popular seaside destination. A cheerful, high-spirited, stand-up paddle (SUP) instructor, she lives and works alongside her father Ryo (Yamaguchi Tomomitsu) and her younger brother Kaito (Onishi Riku), while helping to manage the family cafeteria and take care of the housework.

Natsumi, who meets people from all walks of life, enjoys spending her free time with her two friends Takigawa Airi (Yoshikawa Ai), an assistant hairdresser, and Ogura Risa (Nimura Sawa), a single mother.

Mizushima Kento (Mamiya Shotaro) graduated from a prestigious university and currently works for a construction company run by his father, a famous architect.
He takes a vacation with his high school friends Sasaki Osamu (Hagiwara Riku), a second year clinical resident, and cheerful moodmaker Yamauchi Mamoru (Shirahama Alan) and following a chance encounter with Natsumi, his feelings gradually change…