Rukeichi Koshaku Tsuma No Maho Kaikaku Hazureko Zokuseidakedo Sensei Chishiki De Oyakudachi

Lilialis is a Marquis's daughter with the Light Magic attribute, considered a "failure" attribute. On her way to her assigned Duke's territory, her carriage falls off a cliff, and in a near-death experience, she remembers that her past life was that of a Japanese otaku. Lilialis somehow survives, but when she wakes up, she is at the Duke's residence, and she is already married to a husband she has never even seen!? Furthermore, her husband proposes a "white marriage" for three years, after which they will divorce. In order to become independent after the divorce, Lilialis decides to improve the status of Light Magic and reform the Duke's territory. She heads to the Adventurer's Guild to register and meets Red, the Guild Master—!!!