Haruto Sakurai went to a special school to become a mangaka. Now graduated, he goes to a publisher to show his first manuscript to finally enter the profession. However, when he meets his publisher, the latter advises him to start with doujinshi. Displeased but having no other choice, he decides to start. But he doesn't count on his twin sister, Miharu, a true fujoshi, who will quickly introduce him to the life of a doujinshika! プロ漫画家志望の櫻井遥斗は、初めて漫画原稿を出版社へ持ち込む。しかし、漫画編集者・柊に「プロ漫画家目指すなら、同人活動してみたら？」という衝撃の“アドバイス”を受ける。さらに双子の妹（腐女子）にそそのかされて、“ボーイズラブ同人誌”を描くことになり…!?