Shoujo wa Shoka no Umi de Nemuru

Phil is a young man learning to manage a bookstore, sent by his mentor to a financially struggling monastery to negotiate buying books from its library. Drawn by curiosity and the monastery's reputation, he is initially turned away by someone at the door. Eventually gaining entry, he discovers that the situation within the monastery is dire. The person who had refused him is revealed to be a noblewoman, not a child as he had assumed. The circumstances are more complex than they first appeared, and Phil quickly realizes he may be in for more than he bargained.