Rougo ni Sonaete Isekai de 8-manmai no Kinka wo Tamemasu

Synopsis

Using several drones with holographic projecting equipment and her world-shifting ability to confuse the dragon, Mitsuha directs Wolf Fang into attacking the beast. When the dragon becomes irritated enough to try and breathe fire, Mitshua shoots an RPG into its open maw, mortally wounding it. The Empire's forces immediately turn tail, and Mitsuha allows the Wolf Fang Commander to keep one of the dragon's fangs before sending them back to Earth. In the aftermath, Mitsuha is invited into the castle to be rewarded, where she coaxes a huge payment for the mercenaries from the assembled nobles and is made a citizen and viscountess of the realm. Returning to Earth, Mitsuha learns that Wolf Fang has sold the dragon fang to a researcher. She returns Alexis, who has recovered, to the kingdom, and with business having come to a standstill due to the war, Mitsuha closes the store and moves to her new fiefdom to resume her retirement plans from there, inviting Colette to serve as her retainer.

(Source: Wikipedia)