Saving 80,000 Gold in Another World for My Retirement 7 (light novel)

Can Mitsuha collect 80,000 gold coins so she can live a leisurely retirement!? The anticipated anime now streaming! Just as business in the New World is starting to look stable, Mitsuha learns that something hostile is afoot in the Kingdom of Vanel… They’re on the brink of war! All of her hard work will go to waste if she doesn’t do something to stop her enemy from gaining too much power. Time to get busy! Training the Zeglusian navy, planning a maritime warfare tactic… How will Mitsuha use her world-jumping ability to solve the crisis? Meanwhile, our busy heroine has no idea of the tension running between…Beatrice and Colette?!