The Fiancee Chosen by the Ring, Vol. 4 (manga)

It's been one week since Aurora was invited to join the Tower, but she still can't make up her mind. If she agrees, she'll be able to devote herself to embroidery, but she'll also be stuck there for five whole years, cut off from the rest of the world. One night, as she struggles to decide, a conversation with Felix sheds some light on how she truly feels...