Yorito Morimiya is passionate about photography, particularly capturing the dynamic skies of sunrises and sunsets. One morning, he encounters a girl involved in a dispute with a vending machine, which he helps resolve by retrieving her tomato juice. The girl then disappears without a word.
Yorito's life is intertwined with that of his sister Aono, as well as their friends Mana and Koyori Ishizuki. They are also drawn into the enigmatic presence of a mysterious girl who periodically appears and disappears, hinting at a hidden past.