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

After losing her family and being left alone, Mitsuha Yamano falls from a cliff and discovers that she can travel between modern Earth and another world resembling old Europe. Her strange gift goes further than transportation: she has also gained abnormal regeneration that lets her survive injuries that should be fatal.

Rather than chase a heroic destiny, Mitsuha creates a very practical retirement plan: save 80,000 gold coins and secure her future. She begins moving goods and knowledge between worlds, selling useful modern products for a profit while keeping Earth as her safety net. Commerce in a land of nobles, wars, and dangerous politics is never simple, however, and Mitsuha soon needs every bit of her wit to protect both her growing business and the people she comes to care about.