Right after taking her entrance exam for pharmacy school, Julianne passed away— and the next thing she knew, she had been reincarnated as the second daughter of a pharmacist in another world. She now lives in Trien, a labyrinth city teeming with adventurers exploring its massive dungeon— a fierce battleground not only for adventurers, but for pharmacists (kusushi) as well. Recalling the dreams from her previous life, Julianne makes up her mind: she will study as a trainee bookseller to build her knowledge, hone her magical skills, and dive into the dungeon with her companions— All to achieve one goal: to become a top-class pharmacist!