As a librarian responsible for book management and assisting patrons, it is a popular yet difficult job to obtain due to limited openings. This spring, Kotono Nanasaki began her first position as a librarian at Ataka Library. Having been passionate about books since childhood, she had always dreamed of becoming a librarian, and now that her dream had come true, she looked forward to her new life with great hope. However, the library's director, Matsui, was facing serious issues such as declining visitors and book theft, putting his job at risk. Desperate to increase patronage, he devised a plan to exploit the youthful and attractive Kotono for his own gain.