Four love stories from Kazumi Kazui and Miyuki Kitagawa.

It is 2019, and mankind has discovered 6 alternate worlds, dubbing them Frontiers. Travel between these Frontiers is considered safer than air travel, but not many people get the chance to do so. Keitarou Umino, a freelance writer, is assigned a new reporting job where he must spend 6 months in Frontier No. 5. He jumps at the chance, but a freak accident in transit leaves him and 5 other passengers stranded in a yet-undiscovered 7th Frontier. Not knowing when help will come, Keitarou and the other earthlings make their first small steps towards life in a brand new world...