Downer Onee-san wa Asobitai

During his first days of junior high, Haru Nitta notices strange changes in his environment. One night, he is approached by an older woman sitting on a park bench, who beckons him over. She invites him to "play" and tells him to "choose your bey." Confused, Haru is unsure what she means by "bey," but the woman reveals herself to be a dedicated Corocoro magazine reader with a strong passion for a particular hobby.