After a decade of seclusion following his parents' passing, 30-year-old Houjou Yuuji takes a bold step to break free from his shut-in life. Stepping outside, he is thrust into a strange realm teeming with unfamiliar creatures. Accompanied by his loyal dog Kotarou, Yuuji adapts to this new world where modern amenities miraculously still function. When he encounters a girl named Alice in the nearby woods, he embraces the role of her protector. Four years pass in this foreign land before Yuuji finally musters the courage to explore a nearby town, marking a significant turning point in his unexpected journey.