In the sequel to Tenkuu Shinpan, a fresh set of characters takes center stage in uncharted territories. Senya, a regular guy with childhood dreams of space travel, finds himself thrust into a new realm after spotting a mysterious 'tower' gliding above his school. This new world reveals a desolate landscape where skyscrapers are linked by precarious bridges. As Senya navigates this strange reality, he encounters a girl on a distant rooftop and a masked figure wielding a sinister weapon, leaving him bewildered and on edge.