Those days when every day was fun. Those days when I was always playing with someone. I don't remember the details, but those days were filled with happiness. Back then, we were surely under a spell. Living in the countryside where the original scenery of Japan remains, Usa lives with her older sister. Now in the 6th grade, Usa's goal is to "play a lot with friends!" Suddenly, a magical girl appears before Usa…!? On a spring day with cherry blossoms dancing in the air, she becomes friends with the magician Lily, but Lily sadly says, "We can only be together for a year." With encounters and farewells… a bittersweet and precious year begins for the two girls…!!