To fall in love with the final boss in another world...

Yui is swept into a whole new world. She wakes up in the kingdom of Samelia, a country protected inside a large barrier. Serika, a knight-in-training, learns of Yui's situation and asks her to serve as a witness to the Knight's Trial in order to bring her into the women-only Northernmost Knights Brigade. Cautious, Yui has her doubts about the vice captain, Eledia, and Serika, who suspiciously leaves out quite a lot in her explanations...