Yorito Morimiya's fascination with the sky leads him to capture its various moods through his lens, from sunrises to clouds. During a sunrise photography session, he encounters a peculiar girl in a dispute with a vending machine. After assisting her, the girl inexplicably vanishes. The tale unfolds, involving Yorito, his sister Aono, and childhood friends Mana and Koyori Ishizuki, alongside a mysterious girl with a hidden darkness. In a realm where magic and enigma intertwine, identities blur, and emotions of love and solitude clash under the ever-watchful sky.