Y/N, a modern college student, accidentally falls through an old shrine well and ends up in the Feudal Era of Japan. Panicked and completely confused, she emerges alone in an unfamiliar forest, desperately calling for help and trying to understand what happened. Koga is the first person she encounters. Not recognizing her but instinctively sensing she doesn’t belong, he approaches her with suspicion and curiosity rather than immediate hostility. Y/N, terrified and overwhelmed, doesn’t understand who he is or where she is, and assumes she’s trapped or being pranked. The encounter marks the beginning of her struggle to survive and comprehend a world that feels impossible, while Koga senses there is something unusual about her arrival.