With the inclusion of the ambitious Ryuusui Nanami, Senkuu Ishigami and his team are nearing completion of their preparations to voyage across the oceans and reach the far side of the world - the origin of the strange green light that caused humanity's petrification. The revival of a skilled chef has ensured an ample food supply for the entire crew, while the remarkable reimagining of the GPS system holds the promise of safety during their journey across the open sea.
The progress in readying for the impending expedition proceeds smoothly until Senkuu receives an unsettling message from an anonymous sender. Fueled by an even stronger determination, the scientist embarks on a quest to delve into this new world's mysteries, driven by his scientific mission. Despite the potential for unwelcome surprises within uncharted territories, Senkuu, armed with the assistance of science, stands prepared to confront any challenge that arises.