Dekiai wa Fukushuu no Ato de: Munouryoku Miko to Unmei no Tsugai

Myorin, the daughter of the head of the Ko clan, who protects the country with special powers, is powerless and useless without a mate. Since birth, she has lived with her guardian beast, Yasutora, and has been searching for a "soul mate," but one never appears. However, Myorin continues to train, searching for "what she can do." One day, the Ko family mansion is burned down and her mother is killed by a demon. Yasutora takes the injured Myorin and flees into the mountains, where he finds General Ejiryu and forcibly makes him Myorin's mate! Their souls are united, and despite only just meeting, they naturally feel the desire to "become one." What will happen to the two?

(Source: Shueisha, translated)