Info-chan (Mari) has lived a very sheltered life. She spent most of it in boarding school, never being immersed in society. At least she had one friend, Ayano Aishi. All that changed one fateful day, her 17th birthday to be precise. She had finally been allowed to go shopping with Ayano when they encounter a stranger who immediately takes interest in Info-chan. She didn't know yet, but this stranger would lead her on a journey that would turn everything she had ever known upside down.