The Savior's Book Café Story in Another World Series by Kyouka Izumi, Oumiya, Reiko Sakurada

After being transported to another world by an orb that calls itself "God," Tsukina used her newfound magical powers to open up a cozy book cafe. Now that she's settled in, she's started dating Il, a handsome soldier. However, Tsukina can't relax just yet. Othel's powerful neighboring countries are making some suspicious moves, and as tensions rise, a new savior arrives at the castle. Is he there to help the kingdom, or is he a new enemy for Tsukina to worry about?

Despite being sent to another world as a Savior, Tsukina has managed to stay out of the spotlight and run her book cafe. With her marriage to her fiance Il on the horizon, Tsukina is looking forward to their peaceful life together. But one of the regulars at the cafe seems to have other plans for Tsukina, and for all the Kingdom of Othel! Will Tsukina get her fairy-tale ending?!