Author Tetsuya Eida, known for his best-selling novel "Strawberry Night," has written a mystery "Borderless" with visualization in mind, and it has been made into a drama for Hikari TV and other networks. The members of the "three Sakamichi" groups (Nogizaka46, Sakurazaka46, and Hinatazaka46) have crossed the boundaries of their groups to participate in this drama, which is the first time that "three Sakamichi" groups have worked together. The seven members are Hikaru Morita (Sakurazaka46), Kyoko Saito (Hinatazaka46), Risa Watanabe (Sakurazaka46), Hiyori Hamagishi (Hinatazaka46), Yui Kobayashi (Sakurazaka46), Seira Hayakawa (Nogizaka46), and Sakura Endo (Nogizaka46). This book features the seven members with photos and interviews.